<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3-mathml3.dtd">
<article xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xml:lang="EN" article-type="brief-report">
<front>
<journal-meta>
<journal-id journal-id-type="publisher-id">Front. Psychol.</journal-id>
<journal-title-group>
<journal-title>Frontiers in Psychology</journal-title>
<abbrev-journal-title abbrev-type="pubmed">Front. Psychol.</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">1664-1078</issn>
<publisher>
<publisher-name>Frontiers Media S.A.</publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.3389/fpsyg.2026.1755136</article-id>
<article-version article-version-type="Version of Record" vocab="NISO-RP-8-2008"/>
<article-categories>
<subj-group subj-group-type="heading">
<subject>Brief Research Report</subject>
</subj-group>
</article-categories>
<title-group>
<article-title>Barriers to physical activity in Spanish adolescents: gender differences</article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author" corresp="yes">
<name><surname>Mart&#x00ED;n-Rodr&#x00ED;guez</surname> <given-names>Mar&#x00ED;a</given-names></name>
<xref ref-type="aff" rid="aff1"><sup>1</sup></xref>
<xref ref-type="corresp" rid="c001"><sup>&#x002A;</sup></xref>
<uri xlink:href="http://loop.frontiersin.org/people/3295585/overview"/>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Conceptualization" vocab-term-identifier="https://credit.niso.org/contributor-roles/conceptualization/">Conceptualization</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Data curation" vocab-term-identifier="https://credit.niso.org/contributor-roles/data-curation/">Data curation</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Formal analysis" vocab-term-identifier="https://credit.niso.org/contributor-roles/formal-analysis/">Formal analysis</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Investigation" vocab-term-identifier="https://credit.niso.org/contributor-roles/investigation/">Investigation</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Project administration" vocab-term-identifier="https://credit.niso.org/contributor-roles/project-administration/">Project administration</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Resources" vocab-term-identifier="https://credit.niso.org/contributor-roles/resources/">Resources</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Supervision" vocab-term-identifier="https://credit.niso.org/contributor-roles/supervision/">Supervision</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Validation" vocab-term-identifier="https://credit.niso.org/contributor-roles/validation/">Validation</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Writing &#x2013; original draft" vocab-term-identifier="https://credit.niso.org/contributor-roles/writing-original-draft/">Writing &#x2013; original draft</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Writing &#x2013; review &amp; editing" vocab-term-identifier="https://credit.niso.org/contributor-roles/writing-review-editing/">Writing &#x2013; review &amp; editing</role>
</contrib>
<contrib contrib-type="author">
<name><surname>IsabelBarriopedro</surname> <given-names>Mar&#x00ED;a</given-names></name>
<xref ref-type="aff" rid="aff1"><sup>1</sup></xref>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Formal analysis" vocab-term-identifier="https://credit.niso.org/contributor-roles/formal-analysis/">Formal analysis</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Investigation" vocab-term-identifier="https://credit.niso.org/contributor-roles/investigation/">Investigation</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Methodology" vocab-term-identifier="https://credit.niso.org/contributor-roles/methodology/">Methodology</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Supervision" vocab-term-identifier="https://credit.niso.org/contributor-roles/supervision/">Supervision</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Validation" vocab-term-identifier="https://credit.niso.org/contributor-roles/validation/">Validation</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Writing &#x2013; original draft" vocab-term-identifier="https://credit.niso.org/contributor-roles/writing-original-draft/">Writing &#x2013; original draft</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Writing &#x2013; review &amp; editing" vocab-term-identifier="https://credit.niso.org/contributor-roles/writing-review-editing/">Writing &#x2013; review &amp; editing</role>
</contrib>
<contrib contrib-type="author">
<name><surname>Prieto</surname> <given-names>Jaime</given-names></name>
<xref ref-type="aff" rid="aff2"><sup>2</sup></xref>
<uri xlink:href="http://loop.frontiersin.org/people/1207144/overview"/>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Data curation" vocab-term-identifier="https://credit.niso.org/contributor-roles/data-curation/">Data curation</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Formal analysis" vocab-term-identifier="https://credit.niso.org/contributor-roles/formal-analysis/">Formal analysis</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Investigation" vocab-term-identifier="https://credit.niso.org/contributor-roles/investigation/">Investigation</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Validation" vocab-term-identifier="https://credit.niso.org/contributor-roles/validation/">Validation</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Writing &#x2013; original draft" vocab-term-identifier="https://credit.niso.org/contributor-roles/writing-original-draft/">Writing &#x2013; original draft</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Writing &#x2013; review &amp; editing" vocab-term-identifier="https://credit.niso.org/contributor-roles/writing-review-editing/">Writing &#x2013; review &amp; editing</role>
</contrib>
<contrib contrib-type="author">
<name><surname>Santacruz-Lozano</surname> <given-names>Jos&#x00E9; Antonio</given-names></name>
<xref ref-type="aff" rid="aff3"><sup>3</sup></xref>
<uri xlink:href="http://loop.frontiersin.org/people/3375986/overview"/>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Data curation" vocab-term-identifier="https://credit.niso.org/contributor-roles/data-curation/">Data curation</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Investigation" vocab-term-identifier="https://credit.niso.org/contributor-roles/investigation/">Investigation</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Supervision" vocab-term-identifier="https://credit.niso.org/contributor-roles/supervision/">Supervision</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Investigation" vocab-term-identifier="https://credit.niso.org/contributor-roles/investigation/">Investigation</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Supervision" vocab-term-identifier="https://credit.niso.org/contributor-roles/supervision/">Supervision</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Writing &#x2013; original draft" vocab-term-identifier="https://credit.niso.org/contributor-roles/writing-original-draft/">Writing &#x2013; original draft</role>
</contrib>
<contrib contrib-type="author">
<name><surname>Clemente-Rem&#x00F3;n</surname> <given-names>&#x00C1;ngel Luis</given-names></name>
<xref ref-type="aff" rid="aff3"><sup>3</sup></xref>
<uri xlink:href="http://loop.frontiersin.org/people/3301326/overview"/>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Data curation" vocab-term-identifier="https://credit.niso.org/contributor-roles/data-curation/">Data curation</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Investigation" vocab-term-identifier="https://credit.niso.org/contributor-roles/investigation/">Investigation</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Supervision" vocab-term-identifier="https://credit.niso.org/contributor-roles/supervision/">Supervision</role>
<role vocab="credit" vocab-identifier="https://credit.niso.org/" vocab-term="Writing &#x2013; original draft" vocab-term-identifier="https://credit.niso.org/contributor-roles/writing-original-draft/">Writing &#x2013; original draft</role>
</contrib>
</contrib-group>
<aff id="aff1"><label>1</label><institution>Grupo de Investigaci&#x00F3;n Psicosocial en el Deporte, Facultad de Ciencias de la Actividad F&#x00ED;sica y del Deporte (INEF) Universidad Polit&#x00E9;cnica de Madrid</institution>, <city>Madrid</city>, <country country="es">Spain</country></aff>
<aff id="aff2"><label>2</label><institution>Department of Financial Economics and Accounting, Rey Juan Carlos University</institution>, <city>Madrid</city>, <country country="es">Spain</country></aff>
<aff id="aff3"><label>3</label><institution>Department of Biomedical Sciences, Alcal&#x00E1; University</institution>, <city>Alcal&#x00E1; de Henares</city>, <country country="es">Spain</country></aff>
<author-notes>
<corresp id="c001"><label>&#x002A;</label>Correspondence: Mar&#x00ED;a Mart&#x00ED;n-Rodr&#x00ED;guez, <email xlink:href="mailto:maria.martin@upm.es">maria.martin@upm.es</email></corresp>
</author-notes>
<pub-date publication-format="electronic" date-type="pub" iso-8601-date="2026-02-19">
<day>19</day>
<month>02</month>
<year>2026</year>
</pub-date>
<pub-date publication-format="electronic" date-type="collection">
<year>2026</year>
</pub-date>
<volume>17</volume>
<elocation-id>1755136</elocation-id>
<history>
<date date-type="received">
<day>26</day>
<month>11</month>
<year>2025</year>
</date>
<date date-type="rev-recd">
<day>21</day>
<month>01</month>
<year>2026</year>
</date>
<date date-type="accepted">
<day>27</day>
<month>01</month>
<year>2026</year>
</date>
</history>
<permissions>
<copyright-statement>Copyright &#x00A9; 2026 Mart&#x00ED;n-Rodr&#x00ED;guez, Barriopedro, Prieto, Santacruz-Lozano and Clemente-Rem&#x00F3;n.</copyright-statement>
<copyright-year>2026</copyright-year>
<copyright-holder>Mart&#x00ED;n-Rodr&#x00ED;guez, Barriopedro, Prieto, Santacruz-Lozano and Clemente-Rem&#x00F3;n</copyright-holder>
<license>
<ali:license_ref start_date="2026-02-19">https://creativecommons.org/licenses/by/4.0/</ali:license_ref>
<license-p>This is an open-access article distributed under the terms of the <ext-link ext-link-type="uri" xlink:href="https://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution License (CC BY)</ext-link>. The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.</license-p>
</license>
</permissions>
<abstract>
<p>Given the concerning levels of physical inactivity among adolescents, particularly girls, the aim of this study was to identify gender differences in perceived barriers to physical activity (PA). A representative sample of 3,159 secondary school students in Spain (1,580 girls and 1,579 boys; mean age = 13.7 &#x00B1; 0.7 years) completed the Perceived Barriers Scale to PA. The structure of the scale was examined to ensure its suitability for this population. While the original version included four types of barriers, two of them (contextual and safety) were found to be closely related. These were therefore combined into a single &#x201C;environmental barriers&#x201D; category, resulting in a revised model that fit the data well. The analysis showed that girls perceived more temporal and intrapersonal barriers to PA than boys. Additionally, regardless of gender, students who did not participate in extracurricular physical activities reported higher levels of all three types of barriers. These findings suggest that promotion strategies should pay special attention to the challenges faced by girls and less active adolescents in order to foster greater equity in physical activity.</p>
</abstract>
<kwd-group>
<kwd>adolescents</kwd>
<kwd>barriers</kwd>
<kwd>gender</kwd>
<kwd>physical activity</kwd>
<kwd>secondary students</kwd>
</kwd-group>
<funding-group>
<funding-statement>The author(s) declared that financial support was received for this work and/or its publication. Funding from Universidad Polit&#x00E9;cnica de Madrid, Research Groups I+D+i Program was provided to publish this study.</funding-statement>
</funding-group>
<counts>
<fig-count count="0"/>
<table-count count="4"/>
<equation-count count="0"/>
<ref-count count="39"/>
<page-count count="8"/>
<word-count count="6090"/>
</counts>
<custom-meta-group>
<custom-meta>
<meta-name>section-at-acceptance</meta-name>
<meta-value>Sport Psychology</meta-value>
</custom-meta>
</custom-meta-group>
</article-meta>
</front>
<body>
<sec id="S1" sec-type="intro">
<label>1</label>
<title>Introduction</title>
<p>The physical, mental and cognitive health benefits of an active lifestyle during adolescence are well documented (<xref ref-type="bibr" rid="B5">Biddle et al., 2019</xref>; <xref ref-type="bibr" rid="B9">Carson et al., 2016</xref>; <xref ref-type="bibr" rid="B32">Poitras et al., 2016</xref>; <xref ref-type="bibr" rid="B34">Rodr&#x00ED;guez-Ayllon et al., 2019</xref>). This evidence underpins the World Health Organization guidelines on physical activity (PA) and sedentary behavior. Adolescents should carry out at least an average of 60 min per day of moderate-to-vigorous intensity, mostly aerobic physical activity across the week, in addition to strength training 3 days per week. This includes physical education, sports and exercise, active travel, play and games (<xref ref-type="bibr" rid="B7">Bull et al., 2020</xref>).</p>
<p>However, approximately 8 out of 10 adolescents do not meet the current PA guidelines, with a greater prevalence of physical inactivity in girls (<xref ref-type="bibr" rid="B1">Araujo et al., 2024</xref>; <xref ref-type="bibr" rid="B20">Guthold et al., 2020</xref>). Thus, national and global action aimed at reducing gender inequalities and increasing access and opportunities for PA among those less active adolescents is a priority (<xref ref-type="bibr" rid="B1">Araujo et al., 2024</xref>; <xref ref-type="bibr" rid="B20">Guthold et al., 2020</xref>; <xref ref-type="bibr" rid="B37">Van Sluijs et al., 2021</xref>; <xref ref-type="bibr" rid="B38">World Health Organization [WHO], 2021</xref>).</p>
<p>Many factors contribute to adolescents&#x2019; PA behaviors. <xref ref-type="bibr" rid="B6">Bronfenbrenner&#x2019;s (1979)</xref> ecological framework is one theoretical approach commonly mentioned as the most suitable to analyze how the physical, psychological, environmental and social factors influence the PA behavior of adolescents. The socio-ecological model which considers multiple levels of influence, ranging from individual to community, is particularly effective to promote multicomponent interventions most likely to be successful in adolescents (<xref ref-type="bibr" rid="B29">Martins et al., 2021</xref>; <xref ref-type="bibr" rid="B31">Perry et al., 2012</xref>; <xref ref-type="bibr" rid="B37">Van Sluijs et al., 2021</xref>).</p>
<p>A recent systematic review identifies the multilevel interplay of social, environmental and individual factors that contribute to the decline in PA from childhood through adolescence. Modifiable factors such as self-efficacy, motivation, academic workload and screen time emerged as key drivers of this trend (<xref ref-type="bibr" rid="B22">Habyarimana et al., 2025</xref>).</p>
<p>An updated systematic review of qualitative studies organized the main barriers and facilitators of adolescents&#x2019; PA around the five higher-order themes to highlight important relationships within the socio-ecological model dimensions and components: Individual factors such as motivation, self-efficacy and motor skills; social and relational factors related to family or friends; PA nature factors such as fun, school-based PA and physical education; life-course factors such as time and competing activities; and sociocultural and environmental factors such as the availability of PA facilities or programs (<xref ref-type="bibr" rid="B29">Martins et al., 2021</xref>).</p>
<p>Regarding the barriers for adolescent girls, the umbrella review conducted by <xref ref-type="bibr" rid="B16">Duffey et al. (2021)</xref> highlights the most frequently identified as the lack of time and the lack of support from peers, family and teachers. From a gender perspective, <xref ref-type="bibr" rid="B21">Guthold et al. (2022)</xref> explain that the strongest barriers to adolescent girls&#x2019; participation in PA are the values and lack of support of family and friends, perceptions of safety and fewer opportunities to be active.</p>
<p>Following the socio-ecological model, the Spanish version of the Scale of Perceived Barriers to PA (<xref ref-type="bibr" rid="B39">Zaragoza et al., 2011</xref>) presents four levels of barriers: intrapersonal, contextual, safety and temporal. The subsequent validation by <xref ref-type="bibr" rid="B36">Sevil et al. (2017)</xref> grouped the contextual and safety barriers in one single factor. This questionnaire has been previously used in the Spanish population (<xref ref-type="bibr" rid="B36">Sevil et al., 2017</xref>; <xref ref-type="bibr" rid="B27">Luque and del Villar, 2019</xref>; <xref ref-type="bibr" rid="B15">Delfa-De-La-Morena et al., 2022</xref>; <xref ref-type="bibr" rid="B28">Mart&#x00ED;n Rodr&#x00ED;guez et al., 2024</xref>), and reported greater temporal and intrapersonal disliking barriers in females. Other countries have also observed that adolescents girls report more barriers to PA than boys (<xref ref-type="bibr" rid="B13">Cowley et al., 2021</xref>; <xref ref-type="bibr" rid="B26">Lazarowicz et al., 2021</xref>; <xref ref-type="bibr" rid="B30">Moore et al., 2023</xref>; <xref ref-type="bibr" rid="B35">Rosselli et al., 2020</xref>).</p>
<p>Regarding the influence between PA status on perceived barriers to PA, the least active adolescents perceive more barriers than more active peers (<xref ref-type="bibr" rid="B15">Delfa-De-La-Morena et al., 2022</xref>; <xref ref-type="bibr" rid="B30">Moore et al., 2023</xref>; <xref ref-type="bibr" rid="B35">Rosselli et al., 2020</xref>; <xref ref-type="bibr" rid="B36">Sevil et al., 2017</xref>).</p>
<p><xref ref-type="bibr" rid="B37">Van Sluijs et al. (2021)</xref> aim to identify populations at risk of physical inactivity and understand its modifiable causes to inform intervention efforts. In Spain, girls and adolescents in secondary school are identified as physical inactivity risk groups (<xref ref-type="bibr" rid="B15">Delfa-De-La-Morena et al., 2022</xref>; <xref ref-type="bibr" rid="B19">Gasol Foundation Europa, 2023</xref>). <xref ref-type="bibr" rid="B21">Guthold et al. (2022)</xref> indicate that more research is needed to identify the barriers to PA participation in girls, as well as their interaction, across diverse contexts and cultures.</p>
<p>However, after a thorough review of the literature, no studies have researched these gender and PA status differences in barriers to PA in a representative sample of the Spanish population in secondary education. We hypothesized that girls score higher than boys in some barriers, and less active adolescents perceive more barriers than more active peers. Therefore, the objective of this study was to identify gender and PA status differences in the perceived barriers to PA in Spanish adolescents in secondary school.</p>
</sec>
<sec id="S2">
<label>2</label>
<title>Methods</title>
<sec id="S2.SS1">
<label>2.1</label>
<title>Participants and study design</title>
<p>The sample design aimed to offer an adequate level of representativeness of the population of girls and boys enrolled in compulsory secondary education (ESO in its Spanish acronym) in Spain. The sample procedure was by simple random selection of class groups with proportional allocation to subgroups according to gender and secondary year. The sample was comprised of 3,159 school children from 1st, 2nd, 3rd, and 4th years of compulsory secondary education (Age mean = 13.7 SD &#x00B1; 0.7 years), 1,580 self-identified girls and 1,579 self-identified boys, with a margin of error of &#x00B1; 1.63%, a confidence interval of 95%, and variance for the most unfavorable case of <italic>p</italic> and <italic>q</italic> = 50. To ensure representativeness, participants were drawn from a diverse range of Autonomous Communities across Spain, covering regions from the north (e.g., Basque Country, Galicia, Cantabria, Navarre), center (e.g., Madrid, Castile and Le&#x00F3;n), and south (e.g., Andalusia, Extremadura, Canary Islands). The highest representation was from Madrid, followed by the Basque Country, and Andalusia, which broadly reflects the population size and school density of these regions. Participants were classified as non-active (<italic>n</italic> = 457, 319 girls and 138 boys) or active (<italic>n</italic> = 2,702, 1,441 boys and 1,261 girls) considering if they did or did not participate in any extracurricular physical activity or sport (including going for walks) apart from school physical education classes.</p>
<p>The technique used was a survey via an on-line questionnaire using the REDCap platform, carried out with the collaboration of the school physical education staff. To this end the collaboration of the teaching staff was sought via the digital platforms of the Consejo COLEF (General Council of Physical and Sports Education). An informative introductory letter was sent to those teachers and schools that volunteered to participate in the study. Participants, and their parents when appropriate, were asked to read and sign a consent form. All procedures complied with the Declaration of Helsinki and were approved by the Universidad Polit&#x00E9;cnica de Madrid ethics committee board (registration number 2022-0861).</p>
</sec>
<sec id="S2.SS2">
<label>2.2</label>
<title>Instruments</title>
<p>The Spanish version of the Perceived Barriers Scale (<xref ref-type="bibr" rid="B11">Chinn et al., 1999</xref>) by <xref ref-type="bibr" rid="B39">Zaragoza et al. (2011)</xref> was used to evaluate barriers. This questionnaire consisted of 17 items graded on a Likert scale from 0 to 6. <xref ref-type="bibr" rid="B39">Zaragoza et al. (2011)</xref> grouped the 17 items into four factors that emerged from their factorial analysis; factors with eigenvalues &#x2265; 1.0 were retained, and a factor loading cutoff of 0.45 was considered to be significant. Intrapersonal disliking with 8 items related to self-efficacy, and motivation (e.g., &#x201C;I don&#x2019;t enjoy PA,&#x201D; &#x201C;I&#x2019;m not good at physical activity and sports&#x201D;); temporal constraints with 4 items (e.g., &#x201C;I have too much school work&#x201D;); safety reasons with 2 items (e.g., &#x201C;Physical activity outdoors is not safe&#x201D;); and Contextual constraints with 3 items related to lack of equipment and social support for PA (e.g., &#x201C;There is no good place to do PA&#x201D;).</p>
</sec>
<sec id="S2.SS3">
<label>2.3</label>
<title>Statistical analysis</title>
<p>The internal structure of the Perceived Barriers Scale (<xref ref-type="bibr" rid="B39">Zaragoza et al., 2011</xref>) was examined using confirmatory factor analysis (CFA). As data did not follow a normal distribution (Mardia&#x2019;s coefficient &#x003E; 5) analyses were performed using the maximum likelihood and robust estimation methods (<xref ref-type="bibr" rid="B3">Bentler, 2005</xref>). The Satorra-Bentler chi-square (S-B &#x03C7;<sup>2</sup>) was computed with the following goodness of fit indices (<xref ref-type="bibr" rid="B4">Bentler, 2006</xref>): the comparative fit index (CFI), the normed fit index (NFI), and the root mean square error of approximation (RMSEA) and its 90% confidence interval. Values of the CFI and NFI close to 0.95 and values of the RMSEA below 0.06 indicate a good fit (<xref ref-type="bibr" rid="B24">Hu and Bentler, 1999</xref>). Convergent validity was analyzed via the calculation of the average variance extracted (AVE), considering values of AVE &#x2265; 0.50. Furthermore, discriminant validity was analyzed comparing the AVE of the factors with the square of the correlation between them (<xref ref-type="bibr" rid="B18">Fornell and Larcker, 1981</xref>). Internal consistency of the factors was assessed by composite reliability (CR), adopting CR &#x2265; 0.70 as the cut-off value (<xref ref-type="bibr" rid="B23">Hair et al., 2014</xref>). The corrected item-factor correlations were also computed to evaluate item homogeneity. Values greater than 0.40 were considered satisfactory.</p>
<p>To analyze the invariance of the Perceived Barriers Scale structure according to gender and PA status, a multi-group analysis was conducted following a series of hierarchically ordered steps. According to <xref ref-type="bibr" rid="B8">Byrne (2010)</xref> and <xref ref-type="bibr" rid="B10">Cheung and Rensvold (2002)</xref>, for invariance to exist it is necessary to verify two criteria: (a) the measurement model should be adjusted to each group; and (b) to perform a multigroup analysis, it is necessary to examine the following invariance types: configural invariance (unconstrained model), metric invariance (weak invariance), and scalar invariance (strong invariance). The comparison between models was conducted using the Satorra-Bentler scaled difference test (<xref ref-type="bibr" rid="B14">Crawford and Henry, 2003</xref>) or the change in CFI. If the difference between the CFI values of two nested models is higher than 0.01 in favor of the less restrictive model, the more restrictive model should be rejected (<xref ref-type="bibr" rid="B10">Cheung and Rensvold, 2002</xref>).</p>
<p>The analysis of physical activity levels as a function of PA status for boys and girls was performed using a two-way between-subjects MANOVA. Effect size was estimated using partial &#x03B7;<sup>2</sup>, with values of approximately 0.01, 0.06, and 0.14 interpreted as small, medium, and large effects, respectively (<xref ref-type="bibr" rid="B12">Cohen, 1988</xref>). Analyses were conducted using the IBM SPSS 26.0 and EQS 6.6 software packages.</p>
</sec>
</sec>
<sec id="S3" sec-type="results">
<label>3</label>
<title>Results</title>
<p>The four-factor structure (M4F) proposed by <xref ref-type="bibr" rid="B39">Zaragoza et al. (2011)</xref> showed an acceptable fit (<xref ref-type="table" rid="T1">Table 1</xref>). However, the AVE values for the Contextual Barriers factor (0.453) and the Safety Barriers factor (0.431) were below the recommended threshold and lower than the squared correlation between these two factors (<italic>r</italic><sup>2</sup> = 0.681), indicating problems with both convergent and discriminant validity. The three-factor model (M3F), obtained by merging the items of these two dimensions into a single <italic>Environmental Barriers factor</italic>, yielded an acceptable fit (<xref ref-type="table" rid="T1">Table 1</xref>). Although the statistical fit indices decreased slightly compared to the original four-factor model, the three-factor model (M3F) was retained due to its parsimony and theoretical coherence [&#x0394;S-B&#x03C7;<sup>2</sup>(3) = 65.5, <italic>p</italic> &#x003C; 0.05]. All standardized factor loadings were statistically significant and above 0.50, with the exception of Item 17 (0.48), which was retained due to its theoretical relevance to the construct (<xref ref-type="table" rid="T2">Table 2</xref>). The AVE for the <italic>Environmental Barriers factor</italic> was 0.60, indicating that more than half of the variance in the items was explained by the factor. The AVE for the <italic>Temporal Barriers factor</italic> was 0.62 and for the <italic>Intrapersonal Barriers factor</italic> 0.53. Composite reliability (CR) values were 0.77, 0.87, and 0.90, respectively. All corrected item&#x2014;total correlations exceeded 0.40 (<xref ref-type="table" rid="T3">Table 3</xref>).</p>
<table-wrap position="float" id="T1">
<label>TABLE 1</label>
<caption><p>Model fit statistics for the measurement models and for the multi-group CFA across gender and PA status.</p></caption>
<table cellspacing="5" cellpadding="5" frame="box" rules="all">
<thead>
<tr>
<th valign="top" align="left"/>
<th valign="top" align="center"/>
<th valign="top" align="center">S-B &#x03C7;<sup>2</sup></th>
<th valign="top" align="center">ML &#x03C7;<sup>2</sup></th>
<th valign="top" align="center">df</th>
<th valign="top" align="center">NFI</th>
<th valign="top" align="center">CFI</th>
<th valign="top" align="center">RMSEA</th>
<th valign="top" align="center">CI 90% RMSEA</th>
</tr>
</thead>
<tbody>
<tr>
<td valign="top" align="left">M4F</td>
<td/>
<td valign="top" align="center">966.17</td>
<td valign="top" align="center">1,614.29</td>
<td valign="top" align="center">113</td>
<td valign="top" align="center">0.933</td>
<td valign="top" align="center">0.940</td>
<td valign="top" align="center">0.049</td>
<td valign="top" align="center">0.046&#x2013;0.052</td>
</tr>
<tr>
<td valign="top" align="left">M3F</td>
<td/>
<td valign="top" align="center">1,030.2</td>
<td valign="top" align="center">1,719.04</td>
<td valign="top" align="center">116</td>
<td valign="top" align="center">0.928</td>
<td valign="top" align="center">0.936</td>
<td valign="top" align="center">0.050</td>
<td valign="top" align="center">0.047&#x2013;0.053</td>
</tr>
<tr>
<td valign="top" align="left" colspan="9"><bold>Gender M3F</bold></td>
</tr>
<tr>
<td/>
<td valign="top" align="center">Girls</td>
<td valign="top" align="center">701.67</td>
<td valign="top" align="center">1,117.61</td>
<td valign="top" align="center">116</td>
<td valign="top" align="center">0.914</td>
<td valign="top" align="center">0.927</td>
<td valign="top" align="center">0.057</td>
<td valign="top" align="center">0.053&#x2013;0.061</td>
</tr>
<tr>
<td/>
<td valign="top" align="center">Boys</td>
<td valign="top" align="center">465</td>
<td valign="top" align="center">817.88</td>
<td valign="top" align="center">116</td>
<td valign="top" align="center">0.927</td>
<td valign="top" align="center">0.944</td>
<td valign="top" align="center">0.044</td>
<td valign="top" align="center">0.040&#x2013;0.048</td>
</tr>
<tr>
<td valign="top" align="left" colspan="9"><bold>PA status M3F</bold></td>
</tr>
<tr>
<td/>
<td valign="top" align="center">Yes</td>
<td valign="top" align="center">876.43</td>
<td valign="top" align="center">1,534.9</td>
<td valign="top" align="center">116</td>
<td valign="top" align="center">0.92</td>
<td valign="top" align="center">0.930</td>
<td valign="top" align="center">0.049</td>
<td valign="top" align="center">0.046&#x2013;0.052</td>
</tr>
<tr>
<td/>
<td valign="top" align="center">No</td>
<td valign="top" align="center">268.85</td>
<td valign="top" align="center">347.68</td>
<td valign="top" align="center">116</td>
<td valign="top" align="center">0.908</td>
<td valign="top" align="center">0.945</td>
<td valign="top" align="center">0.054</td>
<td valign="top" align="center">0.045&#x2013;0.062</td>
</tr>
<tr>
<td valign="top" align="left" colspan="9"><bold>Invariance across gender M3F</bold></td>
</tr>
<tr>
<td/>
<td valign="top" align="center">Configural</td>
<td valign="top" align="center">1,154.95</td>
<td valign="top" align="center">1,935.49</td>
<td valign="top" align="center">232</td>
<td valign="top" align="center">0.920</td>
<td valign="top" align="center">0.934</td>
<td valign="top" align="center">0.050</td>
<td valign="top" align="center">0.047&#x2013;0.053</td>
</tr>
<tr>
<td/>
<td valign="top" align="center">Metric</td>
<td valign="top" align="center">1,174.01</td>
<td valign="top" align="center">1,969.56</td>
<td valign="top" align="center">246</td>
<td valign="top" align="center">0.918</td>
<td valign="top" align="center">0.934</td>
<td valign="top" align="center">0.049</td>
<td valign="top" align="center">0.046&#x2013;0.052</td>
</tr>
<tr>
<td/>
<td valign="top" align="center">Scalar</td>
<td valign="top" align="center">1,268.59</td>
<td valign="top" align="center">2,075.56</td>
<td valign="top" align="center">260</td>
<td valign="top" align="center">0.918</td>
<td valign="top" align="center">0.935</td>
<td valign="top" align="center">0.050</td>
<td valign="top" align="center">0.047&#x2013;0.052</td>
</tr>
<tr>
<td valign="top" align="left" colspan="9"><bold>Invariance across PA status M3F</bold></td>
</tr>
<tr>
<td/>
<td valign="top" align="center">Configural</td>
<td valign="top" align="center">1,236.7</td>
<td valign="top" align="center">1,882.58</td>
<td valign="top" align="center">232</td>
<td valign="top" align="center">0.922</td>
<td valign="top" align="center">0.936</td>
<td valign="top" align="center">0.052</td>
<td valign="top" align="center">0.050&#x2013;0.055</td>
</tr>
<tr>
<td/>
<td valign="top" align="center">Metric</td>
<td valign="top" align="center">1,305.53</td>
<td valign="top" align="center">1,960.8</td>
<td valign="top" align="center">246</td>
<td valign="top" align="center">0.918</td>
<td valign="top" align="center">0.932</td>
<td valign="top" align="center">0.052</td>
<td valign="top" align="center">0.049&#x2013;0.055</td>
</tr>
<tr>
<td/>
<td valign="top" align="center">Scalar</td>
<td valign="top" align="center">1,624.02</td>
<td valign="top" align="center">2,327.06</td>
<td valign="top" align="center">260</td>
<td valign="top" align="center">0.922</td>
<td valign="top" align="center">0.934</td>
<td valign="top" align="center">0.054</td>
<td valign="top" align="center">0.052&#x2013;0.057</td>
</tr>
</tbody>
</table>
<table-wrap-foot>
<fn><p>S-B &#x03C7;<sup>2</sup>, Satorra&#x2013;Bentler chi-square; df, degrees of freedom; ML &#x03C7;<sup>2</sup>, maximum likelihood chi-square; CFI, Comparative Fit Index; NFI, Normed Fit Index; RMSEA, Root Mean Square Error of Approximation; CI, Confidence Interval.</p></fn>
</table-wrap-foot>
</table-wrap>
<table-wrap position="float" id="T2">
<label>TABLE 2</label>
<caption><p>Standardized factor loadings and factor correlations for the three-factor model (M3F).</p></caption>
<table cellspacing="5" cellpadding="5" frame="box" rules="all">
<thead>
<tr>
<th valign="top" align="left">Item</th>
<th valign="top" align="center" colspan="3">Factors</th>
</tr>
<tr>
<th valign="top" align="left"/>
<th valign="top" align="center">Environmental</th>
<th valign="top" align="center">Temporal</th>
<th valign="top" align="center">Intrapersonal</th>
</tr>
</thead>
<tbody>
<tr>
<td valign="top" align="left">I1</td>
<td valign="top" align="center">0.78</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">&#x2013;</td>
</tr>
<tr>
<td valign="top" align="left">I2</td>
<td valign="top" align="center">0.78</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">&#x2013;</td>
</tr>
<tr>
<td valign="top" align="left">I3</td>
<td valign="top" align="center">0.81</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">&#x2013;</td>
</tr>
<tr>
<td valign="top" align="left">I4</td>
<td valign="top" align="center">0.72</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">&#x2013;</td>
</tr>
<tr>
<td valign="top" align="left">I5</td>
<td valign="top" align="center">0.79</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">&#x2013;</td>
</tr>
<tr>
<td valign="top" align="left">I6</td>
<td valign="top" align="center">0.75</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">&#x2013;</td>
</tr>
<tr>
<td valign="top" align="left">I7</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">0.48</td>
<td valign="top" align="center">&#x2013;</td>
</tr>
<tr>
<td valign="top" align="left">I8</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">0.67</td>
<td valign="top" align="center">&#x2013;</td>
</tr>
<tr>
<td valign="top" align="left">I9</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">0.54</td>
<td valign="top" align="center">&#x2013;</td>
</tr>
<tr>
<td valign="top" align="left">I10</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">0.57</td>
</tr>
<tr>
<td valign="top" align="left">I11</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">0.66</td>
</tr>
<tr>
<td valign="top" align="left">I12</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">0.53</td>
</tr>
<tr>
<td valign="top" align="left">I13</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">0.74</td>
</tr>
<tr>
<td valign="top" align="left">I14</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">0.89</td>
</tr>
<tr>
<td valign="top" align="left">I15</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">0.67</td>
</tr>
<tr>
<td valign="top" align="left">I16</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">0.56</td>
</tr>
<tr>
<td valign="top" align="left">I17</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">&#x2013;</td>
<td valign="top" align="center">0.80</td>
</tr>
</tbody>
</table></table-wrap>
<table-wrap position="float" id="T3">
<label>TABLE 3</label>
<caption><p>Corrected item-total correlations (CITC), means and standard deviations.</p></caption>
<table cellspacing="5" cellpadding="5" frame="box" rules="all">
<thead>
<tr>
<th valign="top" align="left">Item</th>
<th valign="top" align="center">CITC</th>
<th valign="top" align="center">M</th>
<th valign="top" align="center">SD</th>
</tr>
</thead>
<tbody>
<tr>
<td valign="top" align="left">I1</td>
<td valign="top" align="center">0.55</td>
<td valign="top" align="center">1.0</td>
<td valign="top" align="center">1.6</td>
</tr>
<tr>
<td valign="top" align="left">I2</td>
<td valign="top" align="center">0.54</td>
<td valign="top" align="center">1.0</td>
<td valign="top" align="center">1.7</td>
</tr>
<tr>
<td valign="top" align="left">I3</td>
<td valign="top" align="center">0.50</td>
<td valign="top" align="center">0.9</td>
<td valign="top" align="center">1.7</td>
</tr>
<tr>
<td valign="top" align="left">I4</td>
<td valign="top" align="center">0.58</td>
<td valign="top" align="center">1.1</td>
<td valign="top" align="center">1.8</td>
</tr>
<tr>
<td valign="top" align="left">I5</td>
<td valign="top" align="center">0.52</td>
<td valign="top" align="center">0.8</td>
<td valign="top" align="center">1.5</td>
</tr>
<tr>
<td valign="top" align="left">I6</td>
<td valign="top" align="center">0.62</td>
<td valign="top" align="center">2.0</td>
<td valign="top" align="center">2.0</td>
</tr>
<tr>
<td valign="top" align="left">I7</td>
<td valign="top" align="center">0.79</td>
<td valign="top" align="center">2.6</td>
<td valign="top" align="center">2.0</td>
</tr>
<tr>
<td valign="top" align="left">I8</td>
<td valign="top" align="center">0.69</td>
<td valign="top" align="center">1.8</td>
<td valign="top" align="center">1.8</td>
</tr>
<tr>
<td valign="top" align="left">I9</td>
<td valign="top" align="center">0.76</td>
<td valign="top" align="center">2.8</td>
<td valign="top" align="center">2.0</td>
</tr>
<tr>
<td valign="top" align="left">I10</td>
<td valign="top" align="center">0.75</td>
<td valign="top" align="center">0.8</td>
<td valign="top" align="center">1.7</td>
</tr>
<tr>
<td valign="top" align="left">I11</td>
<td valign="top" align="center">0.71</td>
<td valign="top" align="center">1.0</td>
<td valign="top" align="center">1.6</td>
</tr>
<tr>
<td valign="top" align="left">I12</td>
<td valign="top" align="center">0.77</td>
<td valign="top" align="center">0.8</td>
<td valign="top" align="center">1.7</td>
</tr>
<tr>
<td valign="top" align="left">I13</td>
<td valign="top" align="center">0.65</td>
<td valign="top" align="center">1.1</td>
<td valign="top" align="center">1.6</td>
</tr>
<tr>
<td valign="top" align="left">I14</td>
<td valign="top" align="center">0.45</td>
<td valign="top" align="center">1.1</td>
<td valign="top" align="center">1.7</td>
</tr>
<tr>
<td valign="top" align="left">I15</td>
<td valign="top" align="center">0.71</td>
<td valign="top" align="center">1.2</td>
<td valign="top" align="center">1.8</td>
</tr>
<tr>
<td valign="top" align="left">I16</td>
<td valign="top" align="center">0.78</td>
<td valign="top" align="center">0.7</td>
<td valign="top" align="center">1.5</td>
</tr>
<tr>
<td valign="top" align="left">I17</td>
<td valign="top" align="center">0.58</td>
<td valign="top" align="center">0.8</td>
<td valign="top" align="center">1.5</td>
</tr>
</tbody>
</table></table-wrap>
<p>The fit of the three-factor model (<xref ref-type="table" rid="T1">Table 1</xref>) was acceptable for both girls (<italic>N</italic> = 1,580) and boys (<italic>N</italic> = 1,579), as well as for students who reported engaging (<italic>N</italic> = 2,702) or not engaging (<italic>N</italic> = 457) in extracurricular physical activity. The indices obtained supported the equivalence of the factor loading pattern (configural invariance) across gender and PA status. The constraint of equal factor loadings (metric invariance) and intercepts (scalar invariance) produced acceptable fit values, with changes in CFI &#x003C; 0.01 (<xref ref-type="table" rid="T1">Table 1</xref>). Thus, both metric and scalar invariance across gender and PA status were supported.</p>
<p><xref ref-type="table" rid="T4">Table 4</xref> presents the descriptive analyses of perceived barriers as a function of extracurricular physical-sports activity status for girls and boys. There was a multivariate main effect of gender [<italic>F</italic>(3, 3,153) = 12.17, <italic>p</italic> &#x003C; 0.001, &#x03B7;<sup>2</sup> = 0.011] and of PA status [<italic>F</italic>(3, 3,153) = 66.63, <italic>p</italic> &#x003C; 0.001, &#x03B7;<sup>2</sup> = 0.060], but no significant interaction between gender and PA status on perceived barriers [<italic>F</italic>(3, 3,153) = 2.33, <italic>p</italic> = 0.072]. Univariate analyses showed that girls reported higher <italic>Temporal Barriers</italic> [<italic>F</italic>(1, 3,155) = 30.74, <italic>p</italic> &#x003C; 0.001, &#x03B7;<sup>2</sup> = 0.010] and higher <italic>Intrapersonal Barriers</italic> [<italic>F</italic>(1, 3,155) = 7.14, <italic>p</italic> = 0.008, &#x03B7;<sup>2</sup> = 0.002] than boys, whereas no significant gender differences were found for <italic>Environmental Barriers</italic> [<italic>F</italic>(1, 3,155) = 0.77, <italic>p</italic> = 0.381]. In addition, students who did not engage in any extracurricular physical-sports activity PA (non-active PA status) perceived higher <italic>Environmental Barriers</italic> [<italic>F</italic>(1, 3,155) = 88.25, <italic>p</italic> &#x003C; 0.001, &#x03B7;<sup>2</sup> = 0.027], higher <italic>Temporal Barriers</italic> [<italic>F</italic>(1, 3,155) = 5.97, <italic>p</italic> = 0.015, &#x03B7;<sup>2</sup> = 0.002], and higher <italic>Intrapersonal Barriers</italic> [<italic>F</italic>(1, 3,155) = 180.55, <italic>p</italic> &#x003C; 0.001, &#x03B7;<sup>2</sup> = 0.054] than those who did participate in any extracurricular physical-sports activity PA (active PA status).</p>
<table-wrap position="float" id="T4">
<label>TABLE 4</label>
<caption><p>Perceived barriers as a function of gender and PA status.</p></caption>
<table cellspacing="5" cellpadding="5" frame="box" rules="all">
<thead>
<tr>
<th valign="top" align="center" colspan="2">Factors</th>
<th valign="top" align="center" colspan="3">Girls</th>
<th valign="top" align="center" colspan="3">Boys</th>
<th valign="top" align="center" colspan="2">PA status</th>
</tr>
<tr>
<th valign="top" align="left" colspan="2"/>
<th valign="top" align="center">Yes</th>
<th valign="top" align="center">No</th>
<th valign="top" align="center">Total</th>
<th valign="top" align="center">Yes</th>
<th valign="top" align="center">No</th>
<th valign="top" align="center">Total</th>
<th valign="top" align="center">Yes</th>
<th valign="top" align="center">No</th>
</tr>
</thead>
<tbody>
<tr>
<td valign="top" align="left" rowspan="2">Environmental</td>
<td valign="top" align="center"><italic>M</italic></td>
<td valign="top" align="center">0.92</td>
<td valign="top" align="center">1.50</td>
<td valign="top" align="center">1.04</td>
<td valign="top" align="center">0.84</td>
<td valign="top" align="center">1.47</td>
<td valign="top" align="center">0.89</td>
<td valign="top" align="center">0.88</td>
<td valign="top" align="center">1.49</td>
</tr>
<tr>
<td valign="top" align="center">SD</td>
<td valign="top" align="center">1.14</td>
<td valign="top" align="center">1.41</td>
<td valign="top" align="center">1.22</td>
<td valign="top" align="center">1.15</td>
<td valign="top" align="center">1.35</td>
<td valign="top" align="center">1.18</td>
<td valign="top" align="center">1.14</td>
<td valign="top" align="center">1.39</td>
</tr>
<tr>
<td valign="top" align="left" rowspan="2">Temporal</td>
<td valign="top" align="center"><italic>M</italic></td>
<td valign="top" align="center">2.42</td>
<td valign="top" align="center">2.80</td>
<td valign="top" align="center">2.50</td>
<td valign="top" align="center">2.10</td>
<td valign="top" align="center">2.14</td>
<td valign="top" align="center">2.10</td>
<td valign="top" align="center">2.25</td>
<td valign="top" align="center">2.60</td>
</tr>
<tr>
<td valign="top" align="center">SD</td>
<td valign="top" align="center">1.61</td>
<td valign="top" align="center">1.77</td>
<td valign="top" align="center">1.65</td>
<td valign="top" align="center">1.60</td>
<td valign="top" align="center">1.76</td>
<td valign="top" align="center">1.61</td>
<td valign="top" align="center">1.61</td>
<td valign="top" align="center">1.79</td>
</tr>
<tr>
<td valign="top" align="left" rowspan="3">Intrapersonal</td>
<td valign="top" align="center"><italic>M</italic></td>
<td valign="top" align="center">0.86</td>
<td valign="top" align="center">1.80</td>
<td valign="top" align="center">1.05</td>
<td valign="top" align="center">0.75</td>
<td valign="top" align="center">1.56</td>
<td valign="top" align="center">0.82</td>
<td valign="top" align="center">0.80</td>
<td valign="top" align="center">1.73</td>
</tr>
<tr>
<td valign="top" align="center">SD</td>
<td valign="top" align="center">1.14</td>
<td valign="top" align="center">1.48</td>
<td valign="top" align="center">1.27</td>
<td valign="top" align="center">1.14</td>
<td valign="top" align="center">1.44</td>
<td valign="top" align="center">1.19</td>
<td valign="top" align="center">1.14</td>
<td valign="top" align="center">1.47</td>
</tr>
<tr>
<td valign="top" align="center"><italic>N</italic></td>
<td valign="top" align="center">1,261</td>
<td valign="top" align="center">319</td>
<td valign="top" align="center">1,580</td>
<td valign="top" align="center">1,441</td>
<td valign="top" align="center">138</td>
<td valign="top" align="center">1,579</td>
<td valign="top" align="center">2,702</td>
<td valign="top" align="center">457</td>
</tr>
</tbody>
</table></table-wrap>
</sec>
<sec id="S4" sec-type="discussion">
<label>4</label>
<title>Discussion</title>
<p>The objective of this study was to identify gender and PA status differences in the perceived barriers to PA in a representative sample of the Spanish population in secondary school.</p>
<p>To this end the Perceived Barriers Scale by <xref ref-type="bibr" rid="B39">Zaragoza et al. (2011)</xref>, was applied, having been previously used with an adolescent population in Spain, and was subjected to a confirmatory factor analysis (CFA) to study its internal structure, and average variance extracted (AVE) was utilized to examine its convergent validity.</p>
<p>Although the four-factor structure proposed by <xref ref-type="bibr" rid="B39">Zaragoza et al. (2011)</xref> revealed an acceptable fit, the contextual and safety barriers factors showed conceptual overlap and limited discriminant validity. Therefore, their combination into a single Environmental Barriers factor was recommended. The resulting three-factor model showed a satisfactory fit and was preferable due to its parsimony and improved conceptual clarity. This approach is consistent with the findings of <xref ref-type="bibr" rid="B36">Sevil et al. (2017)</xref>, who found that the safety barriers factor could be grouped with contextual barriers based on their factorial behavior.</p>
<p>The analysis showed no effect of gender on this <italic>Environmental Barriers Factor</italic>. When comparing these results with previous studies using safety barriers factor and contextual barriers factor separately, we found some disparity in the results. This coincides with <xref ref-type="bibr" rid="B15">Delfa-De-La-Morena et al. (2022)</xref> who found no gender effect in safety or contextual barriers, while <xref ref-type="bibr" rid="B28">Mart&#x00ED;n Rodr&#x00ED;guez et al. (2024)</xref> found that the girls presented higher scores in safety and contextual barriers. This variability suggests the suitability of using the <italic>Environmental Barriers factor</italic>, with a significantly better fit than the two separate factors of contextual and safety barriers originally proposed by <xref ref-type="bibr" rid="B39">Zaragoza et al. (2011)</xref>.</p>
<p>This <italic>Environmental Barriers factor</italic> of the Perceived Barriers Scale (<xref ref-type="bibr" rid="B39">Zaragoza et al., 2011</xref>) has strengths and limitations that should be taken into account when interpreting the findings. This questionnaire includes items related to lack of good or safe places nearby, equipment, social support from peers and family to practice autonomous PA in outdoors spaces, assessing a part related to environmental barriers most frequently cited by adolescent girls (<xref ref-type="bibr" rid="B16">Duffey et al., 2021</xref>), taking into account that girls were more likely than boys to perceive a lack of convenient and safe places nearby as barriers to PA (<xref ref-type="bibr" rid="B33">Ricardos et al., 2022</xref>). On the other hand, it did not include specific items related to organized programs guided by teachers or trainers which may be considered as a limitation and also should be addressed in future studies. This could explain why previous studies which had considered this type of practice indicated greater environmental barriers for girls (<xref ref-type="bibr" rid="B13">Cowley et al., 2021</xref>; <xref ref-type="bibr" rid="B25">Jongenelis et al., 2018</xref>; <xref ref-type="bibr" rid="B21">Guthold et al., 2022</xref>; <xref ref-type="bibr" rid="B33">Ricardos et al., 2022</xref>).</p>
<p>One key conclusion that emerges is that adolescent girls presented greater temporal and intrapersonal barriers to PA. The results identify gender differences in the <italic>Temporal Barriers</italic> and <italic>Intrapersonal Barriers</italic> factors, both being greater in the girls which coincides with previous studies that used the Perceived Barriers Scale (<xref ref-type="bibr" rid="B39">Zaragoza et al., 2011</xref>) in different Spanish population groups (<xref ref-type="bibr" rid="B15">Delfa-De-La-Morena et al., 2022</xref>; <xref ref-type="bibr" rid="B27">Luque and del Villar, 2019</xref>; <xref ref-type="bibr" rid="B28">Mart&#x00ED;n Rodr&#x00ED;guez et al., 2024</xref>; <xref ref-type="bibr" rid="B36">Sevil et al., 2017</xref>) and agrees with the existing literature (<xref ref-type="bibr" rid="B35">Rosselli et al., 2020</xref>; <xref ref-type="bibr" rid="B21">Guthold et al., 2022</xref>; <xref ref-type="bibr" rid="B26">Lazarowicz et al., 2021</xref>; <xref ref-type="bibr" rid="B30">Moore et al., 2023</xref>).</p>
<p>The analysis of the possible effects between gender and PA status on perceived barriers, showed no significative interaction which contrasts with previous studies in which non-active girls reported more barriers than non-active boys (<xref ref-type="bibr" rid="B15">Delfa-De-La-Morena et al., 2022</xref>; <xref ref-type="bibr" rid="B36">Sevil et al., 2017</xref>). This finding is not entirely comparable since neither the range of the participants&#x2019; ages nor the educational stages evaluated were the same.</p>
<p>Another relevant conclusion is that independently of gender those not engaged in in any extracurricular physical-sports activity (non-active PA status), reported greater temporal, environmental and intrapersonal barriers than those engaged in any extracurricular physical-sports activity PA (active PA status). These results coincide with those obtained in the Spanish population by <xref ref-type="bibr" rid="B36">Sevil et al. (2017)</xref> and those of <xref ref-type="bibr" rid="B15">Delfa-De-La-Morena et al. (2022)</xref> who also found a greater incidence of intrapersonal and contextual, though not temporal, barriers in the non-active group. Similarly in other countries, <xref ref-type="bibr" rid="B30">Moore et al. (2023)</xref> and <xref ref-type="bibr" rid="B25">Jongenelis et al. (2018)</xref> found that less active adolescents were more likely to encounter these barriers compared to more active peers. On the other hand, <xref ref-type="bibr" rid="B17">Fern&#x00E1;ndez et al. (2017)</xref> found no correlation between PA status and perceived barriers. This variation in the results may be due to the different instruments used to assess the perceived barriers, the different ages or educational stages, as well as the different ways of assessing PA status, with most studies using the IPAQ questionnaire. In this study it was considered of interest to evaluate PA status as a function of whether or not subjects engaged in extracurricular physical education in Compulsory Secondary Education in Spain because increasing PA for those with lower PA levels provides more health benefits (<xref ref-type="bibr" rid="B1">Araujo et al., 2024</xref>).</p>
<p>Interestingly, the <italic>Temporal Barriers factor</italic> attained the highest scores in all the groups analyzed in this study. Lack of time has been shown as one of the most important barriers for adolescent girls (<xref ref-type="bibr" rid="B16">Duffey et al., 2021</xref>) and also a recurrent barrier for adolescents, with the increasing workload and academic demands being suggested as the main reason (<xref ref-type="bibr" rid="B29">Martins et al., 2021</xref>; <xref ref-type="bibr" rid="B37">Van Sluijs et al., 2021</xref>). This academic workload is a social key driver of PA decline in adolescence (<xref ref-type="bibr" rid="B22">Habyarimana et al., 2025</xref>). From a gender perspective, it is worth highlighting that the item related to homework does not specify if these tasks are academic or household chores or caring for others, traditionally attributed to the female gender which could be considered as a limitation and also should be addressed in future studies.</p>
<p>The <italic>Intrapersonal Barriers factor</italic> was, together with the temporal one, greater in girls and in the non-active group. This factor assesses aspects related to motivation and self-efficacy identified as individual key drivers in the decline of PA through adolescence (<xref ref-type="bibr" rid="B22">Habyarimana et al., 2025</xref>). Physical competence and motor skills, as well as tiredness and laziness are items included in this intrapersonal disliking barriers factor provided by the Perceived Barriers Scale (<xref ref-type="bibr" rid="B39">Zaragoza et al., 2011</xref>). However, the questionnaire used in our study did not include items related to body image, femininity or sociocultural gender roles and norms identified in previous studies as relevant barriers for girls (<xref ref-type="bibr" rid="B1">Araujo et al., 2024</xref>; <xref ref-type="bibr" rid="B13">Cowley et al., 2021</xref>; <xref ref-type="bibr" rid="B16">Duffey et al., 2021</xref>; <xref ref-type="bibr" rid="B17">Fern&#x00E1;ndez et al., 2017</xref>; <xref ref-type="bibr" rid="B30">Moore et al., 2023</xref>; <xref ref-type="bibr" rid="B35">Rosselli et al., 2020</xref>) which may be considered as a limitation and should also be addressed in future studies.</p>
<p>From a gender perspective, several studies highlight that gender inequality was a multilevel factor, crossing all socioecological levels (<xref ref-type="bibr" rid="B1">Araujo et al., 2024</xref>; <xref ref-type="bibr" rid="B13">Cowley et al., 2021</xref>; <xref ref-type="bibr" rid="B16">Duffey et al., 2021</xref>; <xref ref-type="bibr" rid="B21">Guthold et al., 2022</xref>; <xref ref-type="bibr" rid="B28">Mart&#x00ED;n Rodr&#x00ED;guez et al., 2024</xref>; <xref ref-type="bibr" rid="B33">Ricardos et al., 2022</xref>) considering that individual, environmental and social barriers are connected. It has been shown that gender, age, self-efficacy, and motivation are correlates associated with PA (<xref ref-type="bibr" rid="B2">Bauman et al., 2012</xref>). It is well known that some arguments that could explain the gender gap in PA are based on the intrinsic socio-cultural barriers that girls face to participate in PA, such as stereotypes or cultural acceptability, or simply the gender-specific lack of opportunities for access because PA is often a recreational choice with more options for, and tailored towards, boys which may disproportionately disadvantage girls. Consequently, the girls find more time-constraints and lack of support from peers. This societal influence on girls&#x2019; PA is intrinsic in society and beyond any traditional determinant of PA. As a result, girls may also have more disliking and less enjoyment from PA practice and less confidence in their sporting abilities (<xref ref-type="bibr" rid="B1">Araujo et al., 2024</xref>; <xref ref-type="bibr" rid="B13">Cowley et al., 2021</xref>; <xref ref-type="bibr" rid="B16">Duffey et al., 2021</xref>; <xref ref-type="bibr" rid="B21">Guthold et al., 2022</xref>; <xref ref-type="bibr" rid="B28">Mart&#x00ED;n Rodr&#x00ED;guez et al., 2024</xref>; <xref ref-type="bibr" rid="B33">Ricardos et al., 2022</xref>).</p>
<p>Finally, another limitation should be stated. First of all, the use of subjective self-reported instruments may elicit errors related to respondent recall or desirability bias. Moreover, the use of different questionnaires in the literature results in different items and barrier groups being evaluated, thus impairing an accurate comparison of findings. However, the weight of the different items has not evaluated which should be considered in future studies. Indeed, our study did not include items related to screen time, currently one of the key factors for the PA decline in adolescence. Therefore, it would be interesting to design a more comprehensive questionnaire, connected with current barriers to PA in adolescence incorporating a gender perspective.</p>
<p>This study highlights the influence of gender on the diverse barriers to PA impacting Spanish adolescents from a socio-ecological perspective. In terms of applicability, these findings have practical implications. To reduce perceived barriers to physical activity among adolescents, particularly girls and non-active students, interventions should be implemented across multiple socio-ecological levels. It is essential to engage several stakeholders at different levels to incorporate a gender-responsive approach toward PA participation. At the school level, teachers and physical education programs should integrate more inclusive, enjoyable, and confidence-building activities, especially for girls, while ensuring equal access to facilities and opportunities. Increased PA opportunities in and out of schools, along with adjustments to academic schedules and demands could help address temporal barriers. At the community level, policymakers and local authorities should ensure the availability of safe, accessible, and appealing spaces for free-time physical activity. Furthermore, actions to enhance family and peer support for PA and sport, especially among girls, can help reduce intrapersonal and environmental barriers. Finally, developing gender-sensitive interventions tailored to adolescents&#x2019; needs and incorporating their voices could further promote equitable participation in PA during adolescence.</p>
</sec>
</body>
<back>
<sec id="S5" sec-type="data-availability">
<title>Data availability statement</title>
<p>The raw data supporting the conclusions of this article will be made available by the authors, without undue reservation.</p>
</sec>
<sec id="S6" sec-type="ethics-statement">
<title>Ethics statement</title>
<p>The studies involving humans were approved by the Comit&#x00E9; de &#x00E9;tica de la Universidad Polit&#x00E9;cnica de Madrid. The studies were conducted in accordance with the local legislation and institutional requirements. Written informed consent for participation in this study was provided by the participants&#x2019; legal guardians/next of kin.</p>
</sec>
<sec id="S7" sec-type="author-contributions">
<title>Author contributions</title>
<p>MM-R: Conceptualization, Data curation, Formal analysis, Investigation, Project administration, Resources, Supervision, Validation, Writing &#x2013; original draft, Writing &#x2013; review &#x0026; editing. MB: Formal analysis, Investigation, Methodology, Supervision, Validation, Writing &#x2013; original draft, Writing &#x2013; review &#x0026; editing. JP: Data curation, Formal analysis, Investigation, Validation, Writing &#x2013; original draft, Writing &#x2013; review &#x0026; editing. JS-L: Data curation, Investigation, Supervision, Writing &#x2013; original draft. &#x00C1;C-R: Data curation, Investigation, Supervision, Writing &#x2013; original draft.</p>
</sec>
<ack>
<title>Acknowledgments</title>
<p>We would like to express our sincere gratitude to Fundaci&#x00F3;n MAPFRE and the Consejo COLEF (General Council of Physical and Sports Education, Spain) for their support as partners of the I+D+i project <italic>Actividades f&#x00ED;sicas y deportivas para las adolescentes</italic> on which this research has been developed.</p>
</ack>
<sec id="S9" sec-type="COI-statement">
<title>Conflict of interest</title>
<p>The author(s) declared that this work was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.</p>
</sec>
<sec id="S10" sec-type="ai-statement">
<title>Generative AI statement</title>
<p>The author(s) declared that generative AI was not used in the creation of this manuscript.</p>
<p>Any alternative text (alt text) provided alongside figures in this article has been generated by Frontiers with the support of artificial intelligence and reasonable efforts have been made to ensure accuracy, including review by the authors wherever possible. If you identify any issues, please contact us.</p>
</sec>
<sec id="S11" sec-type="disclaimer">
<title>Publisher&#x2019;s note</title>
<p>All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.</p>
</sec>
<ref-list>
<title>References</title>
<ref id="B1"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Araujo</surname> <given-names>R. H. O.</given-names></name> <name><surname>O&#x2019;Werneck</surname> <given-names>A.</given-names></name> <name><surname>Martins</surname> <given-names>C. L.</given-names></name> <name><surname>Barboza</surname> <given-names>L. L.</given-names></name> <name><surname>Tassitano</surname> <given-names>R. M.</given-names></name> <name><surname>Aguilar-Far&#x00ED;as</surname> <given-names>N.</given-names></name><etal/></person-group> (<year>2024</year>). <article-title>Global prevalence and gender inequalities in at least 60 min of self-reported moderate-to-vigorous physical activity 1 or more days per week: An analysis with 707,616 adolescents.</article-title> <source><italic>J. Sport Health Sci.</italic></source> <volume>13</volume> <fpage>709</fpage>&#x2013;<lpage>716</lpage>. <pub-id pub-id-type="doi">10.1016/j.jshs.2023.10.011</pub-id> <pub-id pub-id-type="pmid">37923057</pub-id></mixed-citation></ref>
<ref id="B2"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Bauman</surname> <given-names>A. E.</given-names></name> <name><surname>Reis</surname> <given-names>R. S.</given-names></name> <name><surname>Sallis</surname> <given-names>J. F.</given-names></name> <name><surname>Wells</surname> <given-names>J. C.</given-names></name> <name><surname>Loos</surname> <given-names>R. J. F.</given-names></name> <name><surname>Martin</surname> <given-names>B. W.</given-names></name></person-group> (<year>2012</year>). <article-title>Correlates of physical activity: Why are some people physically active and others not?</article-title> <source><italic>Lancet</italic></source> <volume>380</volume> <fpage>258</fpage>&#x2013;<lpage>271</lpage>. <pub-id pub-id-type="doi">10.1016/S0140-6736(12)60735-1</pub-id> <pub-id pub-id-type="pmid">22818938</pub-id></mixed-citation></ref>
<ref id="B3"><mixed-citation publication-type="book"><person-group person-group-type="author"><name><surname>Bentler</surname> <given-names>P. M.</given-names></name></person-group> (<year>2005</year>). <source><italic>EQS 6 Structural Equations Program Manual.</italic></source> <publisher-loc>Encino, CA</publisher-loc>: <publisher-name>Multivariate Software</publisher-name>.</mixed-citation></ref>
<ref id="B4"><mixed-citation publication-type="book"><person-group person-group-type="author"><name><surname>Bentler</surname> <given-names>P. M.</given-names></name></person-group> (<year>2006</year>). <source><italic>EQS 6.1 Structural Equations Program Manual.</italic></source> <publisher-loc>Encino, CA</publisher-loc>: <publisher-name>Multivariate Software</publisher-name>.</mixed-citation></ref>
<ref id="B5"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Biddle</surname> <given-names>S. J.</given-names></name> <name><surname>Ciaccioni</surname> <given-names>S.</given-names></name> <name><surname>Thomas</surname> <given-names>G.</given-names></name> <name><surname>Vergeer</surname> <given-names>I.</given-names></name></person-group> (<year>2019</year>). <article-title>Physical activity and mental health in children and adolescents: An updated review of reviews and an analysis of causality.</article-title> <source><italic>Psychol. Sport Exerc.</italic></source> <volume>42</volume> <fpage>146</fpage>&#x2013;<lpage>155</lpage>. <pub-id pub-id-type="doi">10.1016/j.psychsport.2018.08.011</pub-id></mixed-citation></ref>
<ref id="B6"><mixed-citation publication-type="book"><person-group person-group-type="author"><name><surname>Bronfenbrenner</surname> <given-names>U.</given-names></name></person-group> (<year>1979</year>). <source><italic>The Ecology of Human Development.</italic></source> <publisher-loc>Cambridge, MA</publisher-loc>: <publisher-name>Harvard University Press</publisher-name>.</mixed-citation></ref>
<ref id="B7"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Bull</surname> <given-names>F. C.</given-names></name> <name><surname>Al-Ansari</surname> <given-names>S. S.</given-names></name> <name><surname>Biddle</surname> <given-names>S.</given-names></name> <name><surname>Borodulin</surname> <given-names>K.</given-names></name> <name><surname>Buman</surname> <given-names>M. P.</given-names></name> <name><surname>Cardon</surname> <given-names>G.</given-names></name><etal/></person-group> (<year>2020</year>). <article-title>World Health Organization 2020 guidelines on physical activity and sedentary behaviour.</article-title> <source><italic>Br. J. Sports Med.</italic></source> <volume>54</volume> <fpage>1451</fpage>&#x2013;<lpage>1462</lpage>. <pub-id pub-id-type="doi">10.1136/bjsports-2020-102955</pub-id> <pub-id pub-id-type="pmid">33239350</pub-id></mixed-citation></ref>
<ref id="B8"><mixed-citation publication-type="book"><person-group person-group-type="author"><name><surname>Byrne</surname> <given-names>B. M.</given-names></name></person-group> (<year>2010</year>). <source><italic>Structural Equation Modeling with AMOS: Basic Concepts, Applications, and Programming</italic></source>, <edition>2nd Edn</edition>. <publisher-loc>New York, NY</publisher-loc>: <publisher-name>Routledge</publisher-name>. <pub-id pub-id-type="doi">10.4324/9780203805534</pub-id></mixed-citation></ref>
<ref id="B9"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Carson</surname> <given-names>V.</given-names></name> <name><surname>Hunter</surname> <given-names>S.</given-names></name> <name><surname>Kuzik</surname> <given-names>N.</given-names></name> <name><surname>Gray</surname> <given-names>C. E.</given-names></name> <name><surname>Poitras</surname> <given-names>V.</given-names></name> <name><surname>Chaput</surname> <given-names>J. P.</given-names></name><etal/></person-group> (<year>2016</year>). <article-title>Systematic review of sedentary behaviour and health indicators in school-aged children and youth: An update.</article-title> <source><italic>Appl. Physiol. Nutr. Metab.</italic></source> <volume>41</volume> <fpage>S240</fpage>&#x2013;<lpage>S265</lpage>. <pub-id pub-id-type="doi">10.1139/apnm-2015-0630</pub-id> <pub-id pub-id-type="pmid">27306432</pub-id></mixed-citation></ref>
<ref id="B10"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Cheung</surname> <given-names>G. W.</given-names></name> <name><surname>Rensvold</surname> <given-names>R. B.</given-names></name></person-group> (<year>2002</year>). <article-title>Evaluating goodness-of-fit indexes for testing measurement invariance.</article-title> <source><italic>Struct. Equ. Modeling</italic></source> <volume>9</volume> <fpage>233</fpage>&#x2013;<lpage>255</lpage>. <pub-id pub-id-type="doi">10.1207/S15328007SEM0902_5</pub-id></mixed-citation></ref>
<ref id="B11"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Chinn</surname> <given-names>D. J.</given-names></name> <name><surname>White</surname> <given-names>M.</given-names></name> <name><surname>Harlen</surname> <given-names>D. J.</given-names></name> <name><surname>Drinkwater</surname> <given-names>C.</given-names></name> <name><surname>Raybould</surname> <given-names>S.</given-names></name></person-group> (<year>1999</year>). <article-title>Barriers to physical activity and socioeconomic position: Implications for health promotion.</article-title> <source><italic>J. Epidemiol. Commun. Health</italic></source> <volume>53</volume> <fpage>191</fpage>&#x2013;<lpage>192</lpage>. <pub-id pub-id-type="doi">10.1136/jech.53.3.191</pub-id> <pub-id pub-id-type="pmid">10396499</pub-id></mixed-citation></ref>
<ref id="B12"><mixed-citation publication-type="book"><person-group person-group-type="author"><name><surname>Cohen</surname> <given-names>J.</given-names></name></person-group> (<year>1988</year>). <source><italic>Statistical Power Analysis for the Behavioral Sciences</italic></source>, <edition>2nd Edn</edition>. <publisher-loc>Hillsdale, NJ</publisher-loc>: <publisher-name>Lawrence Erlbaum Associates</publisher-name>.</mixed-citation></ref>
<ref id="B13"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Cowley</surname> <given-names>E. S.</given-names></name> <name><surname>Watson</surname> <given-names>P. M.</given-names></name> <name><surname>Foweather</surname> <given-names>L.</given-names></name> <name><surname>Belton</surname> <given-names>S.</given-names></name> <name><surname>Thompson</surname> <given-names>A.</given-names></name> <name><surname>Thijssen</surname> <given-names>D.</given-names></name><etal/></person-group> (<year>2021</year>). <article-title>&#x201C;Girls aren&#x2019;t meant to exercise&#x201D;: Perceived influences on physical activity among adolescent girls-the HERizon Project.</article-title> <source><italic>Children</italic></source> <volume>8</volume>:<fpage>31</fpage>. <pub-id pub-id-type="doi">10.3390/children8010031</pub-id> <pub-id pub-id-type="pmid">33430413</pub-id></mixed-citation></ref>
<ref id="B14"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Crawford</surname> <given-names>J. R.</given-names></name> <name><surname>Henry</surname> <given-names>J. D.</given-names></name></person-group> (<year>2003</year>). <article-title>The depression anxiety stress scales: Normative data and latent structure in a large non-clinical sample.</article-title> <source><italic>Br. J. Clin. Psychol.</italic></source> <volume>42</volume> <fpage>111</fpage>&#x2013;<lpage>131</lpage>. <pub-id pub-id-type="doi">10.1348/014466503321903544</pub-id> <pub-id pub-id-type="pmid">12828802</pub-id></mixed-citation></ref>
<ref id="B15"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Delfa-De-La-Morena</surname> <given-names>J. M.</given-names></name> <name><surname>Bores-Garc&#x00ED;a</surname> <given-names>D.</given-names></name> <name><surname>Solera-Alfonso</surname> <given-names>A.</given-names></name> <name><surname>Romero-Parra</surname> <given-names>N.</given-names></name></person-group> (<year>2022</year>). <article-title>Barriers to physical activity in Spanish children and adolescents: Sex and educational stage differences.</article-title> <source><italic>Front. Psychol.</italic></source> <volume>13</volume>:<fpage>910930</fpage>. <pub-id pub-id-type="doi">10.3389/fpsyg.2022.910930</pub-id> <pub-id pub-id-type="pmid">35726266</pub-id></mixed-citation></ref>
<ref id="B16"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Duffey</surname> <given-names>K.</given-names></name> <name><surname>Barbosa</surname> <given-names>A.</given-names></name> <name><surname>Whiting</surname> <given-names>S.</given-names></name> <name><surname>Mendes</surname> <given-names>R.</given-names></name> <name><surname>Yordi Aguirre</surname> <given-names>I.</given-names></name> <name><surname>Tcymbal</surname> <given-names>A.</given-names></name><etal/></person-group> (<year>2021</year>). <article-title>Barriers and facilitators of physical activity participation in adolescent girls: A systematic review of systematic reviews.</article-title> <source><italic>Front. Public Health</italic></source> <volume>9</volume>:<fpage>743935</fpage>. <pub-id pub-id-type="doi">10.3389/fpubh.2021.743935</pub-id> <pub-id pub-id-type="pmid">34722450</pub-id></mixed-citation></ref>
<ref id="B17"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Fern&#x00E1;ndez</surname> <given-names>I.</given-names></name> <name><surname>Canet</surname> <given-names>O.</given-names></name> <name><surname>Gin&#x00E9;-Garriga</surname> <given-names>M.</given-names></name></person-group> (<year>2017</year>). <article-title>Assessment of physical activity levels, fitness and perceived barriers to physical activity practice in adolescents: Cross-sectional study.</article-title> <source><italic>Eur. J. Pediatr.</italic></source> <volume>176</volume> <fpage>57</fpage>&#x2013;<lpage>65</lpage>. <pub-id pub-id-type="doi">10.1007/s00431-016-2809-4</pub-id> <pub-id pub-id-type="pmid">27858223</pub-id></mixed-citation></ref>
<ref id="B18"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Fornell</surname> <given-names>C.</given-names></name> <name><surname>Larcker</surname> <given-names>D. F.</given-names></name></person-group> (<year>1981</year>). <article-title>Evaluating structural equation models with unobservable variables and measurement error.</article-title> <source><italic>J. Mark. Res.</italic></source> <volume>18</volume> <fpage>39</fpage>&#x2013;<lpage>50</lpage>. <pub-id pub-id-type="doi">10.1177/002224378101800104</pub-id></mixed-citation></ref>
<ref id="B19"><mixed-citation publication-type="book"><collab>Gasol Foundation Europa</collab> (<year>2023</year>). <source><italic>PASOS Physical Activity, Sedentarism, Lifestyles and Obesity in Spanish Youth Informe Extenso.</italic></source> <publisher-loc>Barcelona</publisher-loc>: <publisher-name>Gasol Foundation Europa</publisher-name>.</mixed-citation></ref>
<ref id="B20"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Guthold</surname> <given-names>R.</given-names></name> <name><surname>Stevens</surname> <given-names>G. A.</given-names></name> <name><surname>Riley</surname> <given-names>L. M.</given-names></name> <name><surname>Bull</surname> <given-names>F. C.</given-names></name></person-group> (<year>2020</year>). <article-title>Global trends in insufficient physical activity among adolescents: A pooled analysis of 298 population-based surveys with 1.6 million participants.</article-title> <source><italic>Lancet Child Adolesc. Health</italic></source> <volume>4</volume> <fpage>23</fpage>&#x2013;<lpage>35</lpage>. <pub-id pub-id-type="doi">10.1016/S2352-4642(19)30323-2</pub-id> <pub-id pub-id-type="pmid">31761562</pub-id></mixed-citation></ref>
<ref id="B21"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Guthold</surname> <given-names>R.</given-names></name> <name><surname>Willumsen</surname> <given-names>J.</given-names></name> <name><surname>Bull</surname> <given-names>F. C.</given-names></name></person-group> (<year>2022</year>). <article-title>What is driving gender inequalities in physical activity among adolescents?</article-title> <source><italic>J. Sport Health Sci.</italic></source> <volume>11</volume> <fpage>424</fpage>&#x2013;<lpage>426</lpage>. <pub-id pub-id-type="doi">10.1016/j.jshs.2022.02.003</pub-id> <pub-id pub-id-type="pmid">35217213</pub-id></mixed-citation></ref>
<ref id="B22"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Habyarimana</surname> <given-names>J. D.</given-names></name> <name><surname>Tugirumukiza</surname> <given-names>E.</given-names></name> <name><surname>Sun</surname> <given-names>H.</given-names></name> <name><surname>Pathirana</surname> <given-names>A.</given-names></name> <name><surname>Zhou</surname> <given-names>K.</given-names></name></person-group> (<year>2025</year>). <article-title>From active play to sedentary lifestyles: Understanding the decline in physical activity from childhood through adolescence&#x2014;a systematic review.</article-title> <source><italic>Front. Public Health</italic></source> <volume>13</volume>:<fpage>1636891</fpage>. <pub-id pub-id-type="doi">10.3389/fpubh.2025.1636891</pub-id> <pub-id pub-id-type="pmid">41283017</pub-id></mixed-citation></ref>
<ref id="B23"><mixed-citation publication-type="book"><person-group person-group-type="author"><name><surname>Hair</surname> <given-names>J. F.</given-names></name> <name><surname>Black</surname> <given-names>W. C.</given-names></name> <name><surname>Babin</surname> <given-names>B. J.</given-names></name> <name><surname>Anderson</surname> <given-names>R. E.</given-names></name></person-group> (<year>2014</year>). <source><italic>Multivariate Data Analysis</italic></source>, <edition>7th Edn</edition>. <publisher-loc>Harlow</publisher-loc>: <publisher-name>Pearson Education Limited</publisher-name>.</mixed-citation></ref>
<ref id="B24"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Hu</surname> <given-names>L.</given-names></name> <name><surname>Bentler</surname> <given-names>P. M.</given-names></name></person-group> (<year>1999</year>). <article-title>Cutoff criteria for fit indexes in covariance structure analysis: Conventional criteria versus new alternatives.</article-title> <source><italic>Struct. Equ. Model.</italic></source> <volume>6</volume> <fpage>1</fpage>&#x2013;<lpage>55</lpage>. <pub-id pub-id-type="doi">10.1080/10705519909540118</pub-id></mixed-citation></ref>
<ref id="B25"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Jongenelis</surname> <given-names>M. I.</given-names></name> <name><surname>Scully</surname> <given-names>M.</given-names></name> <name><surname>Morley</surname> <given-names>B.</given-names></name> <name><surname>Pratt</surname> <given-names>I. S.</given-names></name> <name><surname>Slevin</surname> <given-names>T.</given-names></name></person-group> (<year>2018</year>). <article-title>Physical activity and screen-based recreation: Prevalences and trends over time among adolescents and barriers to recommended engagement.</article-title> <source><italic>Prev. Med.</italic></source> <volume>106</volume> <fpage>66</fpage>&#x2013;<lpage>72</lpage>. <pub-id pub-id-type="doi">10.1016/j.ypmed.2017.10.006</pub-id> <pub-id pub-id-type="pmid">28987330</pub-id></mixed-citation></ref>
<ref id="B26"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Lazarowicz</surname> <given-names>A.</given-names></name> <name><surname>O&#x2019;Hara</surname> <given-names>R. L.</given-names></name> <name><surname>Broder</surname> <given-names>J. C.</given-names></name> <name><surname>Grunberg</surname> <given-names>D. M. S.</given-names></name> <name><surname>Gasevic</surname> <given-names>D.</given-names></name></person-group> (<year>2021</year>). <article-title>Gender differences in barriers to participation in after-school physical activities and related factors in Australian schoolchildren: A cross-sectional study.</article-title> <source><italic>Health Promot. J. Austr.</italic></source> <volume>32</volume> <fpage>139</fpage>&#x2013;<lpage>146</lpage>. <pub-id pub-id-type="doi">10.1002/hpja.441</pub-id> <pub-id pub-id-type="pmid">33191644</pub-id></mixed-citation></ref>
<ref id="B27"><mixed-citation publication-type="book"><person-group person-group-type="author"><name><surname>Luque</surname> <given-names>A.</given-names></name> <name><surname>del Villar</surname> <given-names>F.</given-names></name></person-group> (<year>2019</year>). <source><italic>Mujer Joven y Actividad F&#x00ED;sica.</italic></source> <publisher-loc>Madrid</publisher-loc>: <publisher-name>Fundaci&#x00F3;n Mapfre</publisher-name>.</mixed-citation></ref>
<ref id="B28"><mixed-citation publication-type="book"><person-group person-group-type="author"><name><surname>Mart&#x00ED;n Rodr&#x00ED;guez</surname> <given-names>M.</given-names></name> <name><surname>Barriopedro Moro</surname> <given-names>M. I.</given-names></name> <name><surname>S&#x00E1;nchez Garc&#x00ED;a</surname> <given-names>R.</given-names></name> <name><surname>Prieto Bermejo</surname> <given-names>J.</given-names></name> <name><surname>Pedrajas Sanz</surname> <given-names>N.</given-names></name> <name><surname>G&#x00F3;mez Ruano</surname> <given-names>M. A.</given-names></name><etal/></person-group> (<year>2024</year>). <source><italic>Actividades F&#x00ED;sicas y Deportivas Para las Adolescentes. Necesidades, Barreras y Recomendaciones.</italic></source> <publisher-loc>Madrid</publisher-loc>: <publisher-name>Fundaci&#x00F3;n MAPFRE</publisher-name>.</mixed-citation></ref>
<ref id="B29"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Martins</surname> <given-names>J.</given-names></name> <name><surname>Costa</surname> <given-names>J.</given-names></name> <name><surname>Sarmento</surname> <given-names>H.</given-names></name> <name><surname>Marques</surname> <given-names>A.</given-names></name> <name><surname>Farias</surname> <given-names>C.</given-names></name> <name><surname>Onofre</surname> <given-names>M.</given-names></name><etal/></person-group> (<year>2021</year>). <article-title>Adolescents&#x2019; perspectives on the barriers and facilitators of physical activity: An updated systematic review of qualitative studies.</article-title> <source><italic>Int. J. Environ. Res. Public Health</italic></source> <volume>18</volume>:<fpage>4954</fpage>. <pub-id pub-id-type="doi">10.3390/ijerph18094954</pub-id> <pub-id pub-id-type="pmid">26324394</pub-id></mixed-citation></ref>
<ref id="B30"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Moore</surname> <given-names>R.</given-names></name> <name><surname>Vernon</surname> <given-names>T.</given-names></name> <name><surname>Gregory</surname> <given-names>M.</given-names></name> <name><surname>Freeman</surname> <given-names>E. L.</given-names></name></person-group> (<year>2023</year>). <article-title>Facilitators and barriers to physical activity among English adolescents in secondary schools: A mixed method study.</article-title> <source><italic>Front. Public Health</italic></source> <volume>11</volume>:<fpage>1235086</fpage>. <pub-id pub-id-type="doi">10.3389/fpubh.2023.1235086</pub-id> <pub-id pub-id-type="pmid">37655286</pub-id></mixed-citation></ref>
<ref id="B31"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Perry</surname> <given-names>C. K.</given-names></name> <name><surname>Garside</surname> <given-names>H.</given-names></name> <name><surname>Morones</surname> <given-names>S.</given-names></name> <name><surname>Hayman</surname> <given-names>L. L.</given-names></name></person-group> (<year>2012</year>). <article-title>Physical activity interventions for adolescents: An ecological perspective.</article-title> <source><italic>J. Prim. Prev.</italic></source> <volume>33</volume> <fpage>111</fpage>&#x2013;<lpage>135</lpage>. <pub-id pub-id-type="doi">10.1007/s10935-012-0270-3</pub-id> <pub-id pub-id-type="pmid">22760973</pub-id></mixed-citation></ref>
<ref id="B32"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Poitras</surname> <given-names>V. J.</given-names></name> <name><surname>Gray</surname> <given-names>C. E.</given-names></name> <name><surname>Borghese</surname> <given-names>M. M.</given-names></name> <name><surname>Carson</surname> <given-names>V.</given-names></name> <name><surname>Chaput</surname> <given-names>J. P.</given-names></name> <name><surname>Janssen</surname> <given-names>I.</given-names></name><etal/></person-group> (<year>2016</year>). <article-title>Systematic review of the relationships between objectively measured physical activity and health indicators in school-aged children and youth.</article-title> <source><italic>Appl. Physiol. Nutr. Metab.</italic></source> <volume>41</volume> <fpage>197</fpage>&#x2013;<lpage>239</lpage>. <pub-id pub-id-type="doi">10.1139/apnm-2015-0663</pub-id> <pub-id pub-id-type="pmid">27306431</pub-id></mixed-citation></ref>
<ref id="B33"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Ricardos</surname> <given-names>L. I. C.</given-names></name> <name><surname>Wendt</surname> <given-names>A.</given-names></name> <name><surname>Costa</surname> <given-names>C. S.</given-names></name> <name><surname>Mielke</surname> <given-names>G. I.</given-names></name> <name><surname>Brazo-Sayavera</surname> <given-names>J.</given-names></name> <name><surname>Khan</surname> <given-names>A.</given-names></name><etal/></person-group> (<year>2022</year>). <article-title>Gender inequalities in physical activity among adolescents from 64 Global South countries.</article-title> <source><italic>J. Sport Health Sci.</italic></source> <volume>11</volume> <fpage>509</fpage>&#x2013;<lpage>520</lpage>. <pub-id pub-id-type="doi">10.1016/j.jshs.2022.01.007J</pub-id></mixed-citation></ref>
<ref id="B34"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Rodr&#x00ED;guez-Ayllon</surname> <given-names>M.</given-names></name> <name><surname>Cadenas-S&#x00E1;nchez</surname> <given-names>C.</given-names></name> <name><surname>Est&#x00E9;vez-L&#x00F3;pez</surname> <given-names>F.</given-names></name> <name><surname>Mu&#x00F1;oz</surname> <given-names>N. E.</given-names></name> <name><surname>Mora-Gonzalez</surname> <given-names>J.</given-names></name> <name><surname>Migueles</surname> <given-names>J. H.</given-names></name><etal/></person-group> (<year>2019</year>). <article-title>Role of physical activity and sedentary behavior in the mental health of preschoolers, children and adolescents: A systematic review and meta-analysis.</article-title> <source><italic>Sports Med.</italic></source> <volume>49</volume> <fpage>1383</fpage>&#x2013;<lpage>1410</lpage>. <pub-id pub-id-type="doi">10.1007/s40279-019-01099-5</pub-id> <pub-id pub-id-type="pmid">30993594</pub-id></mixed-citation></ref>
<ref id="B35"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Rosselli</surname> <given-names>M.</given-names></name> <name><surname>Ermini</surname> <given-names>E.</given-names></name> <name><surname>Tosi</surname> <given-names>B.</given-names></name> <name><surname>Boddi</surname> <given-names>M.</given-names></name> <name><surname>Stefani</surname> <given-names>L.</given-names></name> <name><surname>Toncelli</surname> <given-names>L.</given-names></name><etal/></person-group> (<year>2020</year>). <article-title>Gender differences in barriers to physical activity among adolescents.</article-title> <source><italic>Nutr. Metab. Cardiovasc. Dis.</italic></source> <volume>30</volume> <fpage>1582</fpage>&#x2013;<lpage>1589</lpage>. <pub-id pub-id-type="doi">10.1016/j.numecd.2020.05.005</pub-id> <pub-id pub-id-type="pmid">32605880</pub-id></mixed-citation></ref>
<ref id="B36"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Sevil</surname> <given-names>J.</given-names></name> <name><surname>Pr&#x00E1;xedes</surname> <given-names>A.</given-names></name> <name><surname>Zaragoza</surname> <given-names>J.</given-names></name> <name><surname>del Villar</surname> <given-names>F.</given-names></name> <name><surname>Garc&#x00ED;a-Gonz&#x00E1;lez</surname> <given-names>L.</given-names></name></person-group> (<year>2017</year>). <article-title>Barreras percibidas para la pr&#x00E1;ctica de actividad f&#x00ED;sica en estudiantes universitarios. Diferencias por g&#x00E9;nero y niveles de actividad f&#x00ED;sica.</article-title> <source><italic>Univ. Psychol.</italic></source> <volume>16</volume> <fpage>1</fpage>&#x2013;<lpage>15</lpage>. <pub-id pub-id-type="doi">10.11144/Javeriana.upsy16-4.bppa</pub-id></mixed-citation></ref>
<ref id="B37"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Van Sluijs</surname> <given-names>E.</given-names></name> <name><surname>Ekelund</surname> <given-names>U.</given-names></name> <name><surname>Crochemore-Silva</surname> <given-names>I.</given-names></name> <name><surname>Guthold</surname> <given-names>R.</given-names></name> <name><surname>Ha</surname> <given-names>A.</given-names></name> <name><surname>Lubans</surname> <given-names>D.</given-names></name></person-group> (<year>2021</year>). <article-title>Physical activity behaviours in adolescence: Current evidence and opportunities for intervention.</article-title> <source><italic>Lancet Ser. Phys. Act.</italic></source> <volume>398</volume> <fpage>429</fpage>&#x2013;<lpage>442</lpage>. <pub-id pub-id-type="doi">10.1016/S0140-6736(21)01259-9</pub-id> <pub-id pub-id-type="pmid">34302767</pub-id></mixed-citation></ref>
<ref id="B38"><mixed-citation publication-type="book"><collab>World Health Organization [WHO]</collab> (<year>2021</year>). <source><italic>Fair Play: Building a Strong Physical Activity System for more Active People.</italic></source> <publisher-loc>Geneva</publisher-loc>: <publisher-name>World Health Organization</publisher-name>.</mixed-citation></ref>
<ref id="B39"><mixed-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Zaragoza</surname> <given-names>J.</given-names></name> <name><surname>Generelo</surname> <given-names>E.</given-names></name> <name><surname>Juli&#x00E1;n</surname> <given-names>J. A.</given-names></name> <name><surname>Abarca-Sos</surname> <given-names>A.</given-names></name></person-group> (<year>2011</year>). <article-title>Barriers to participation in physical activity among adolescent girls defined by physical activity level.</article-title> <source><italic>J. Sports Med. Phys. Fitness</italic></source> <volume>51</volume> <fpage>128</fpage>&#x2013;<lpage>135</lpage>.</mixed-citation></ref>
</ref-list>
<fn-group>
<fn id="n1" fn-type="custom" custom-type="edited-by"><p>Edited by: <ext-link ext-link-type="uri" xlink:href="https://loop.frontiersin.org/people/590006/overview">David Manzano S&#x00E1;nchez</ext-link>, University of Almer&#x00ED;a, Spain</p></fn>
<fn id="n2" fn-type="custom" custom-type="reviewed-by"><p>Reviewed by: <ext-link ext-link-type="uri" xlink:href="https://loop.frontiersin.org/people/811023/overview">Sof&#x00ED;a M. Mart&#x00ED;nez-S&#x00E1;nchez</ext-link>, University of Huelva, Spain</p>
<p><ext-link ext-link-type="uri" xlink:href="https://loop.frontiersin.org/people/3013313/overview">Milena Mitrovi&#x0107;</ext-link>, University of Montenegro, Montenegro</p></fn>
</fn-group>
</back>
</article>