About 30% of adults worldwide (Hallal et al., 2012) do not meet the minimum World Health Organization recommendation on daily activity (World Health Organization, 2010). The inactivity starts in adolescence with a high proportion (80%) of inactive adolescents [aged 13–15 years and doing less than the WHO-recommended minimum of 60 min daily of physical activity (PA)] (Hallal et al., 2012). Physical inactivity leads to many pathologies, from cardio-metabolic disorders to cardiovascular diseases (Booth et al., 2017). Physical inactivity is now the fourth leading cause of death worldwide (Kohl et al., 2012). The deleterious effects of physical inactivity on health are now well-established for inducing many pathologies, from cardio-metabolic disorders to cardiovascular diseases (van der Ploeg et al., 2012; Booth et al., 2017).

To counterbalance these effects, a pill exists with many pharmacological effects: Physical Activity; i.e., Sports and Active Living (Imbeault, 2007; The exercise pill, 2008; Church and Blair, 2009; Lobelo et al., 2014). Higher PA levels are associated with a lower risk of death and cardiovascular events, irrespective of country income (Arem et al., 2015; Lear et al., 2017). Even a very moderate dose brings benefits for health: low PA loads, even below the WHO minimum recommendations, can provide major benefits; notably, running 5–10 min per day at slow speeds was associated with a considerably reduced risk of cardiovascular death (Lee et al., 2014). However, there are some additional benefits of a higher dose of PA as shown by an inverse relationship between total PA and mortality (Paffenbarger et al., 1993; Lee et al., 1995). However, badly prescribed exercise (too often, too intense, too long, not individualized or adapted) can hurt and may be worse than inactivity (Eijsvogels and Thompson, 2015), leading to musculo-skeletal injuries, pathologies (such as rhabdomyolysis) (Eichner, 2017), or addiction (Hausenblas et al., 2017). We therefore need to know more about injury prevention (Silva et al., 2018) and the different mechanisms of injury occurrence such training load (Soligard et al., 2016; Gabbett and Whiteley, 2017) or biomechanics (Hewett and Bates, 2017).

A key message is that it is never too late to start an active life. Regular exercise has multi-system antiaging effects. Regular endurance exercise promotes longevity through pathways common to effects of caloric restriction (Lanza et al., 2008): regular endurance exercise partly normalizes age-related mitochondrial dysfunction. In elderly patients, PA has a positive effect on cognitive flexibility, depressive symptoms, and sleep disorders, which can be signs of an ongoing neurodegenerative process as Alzheimer's disease and Parkinson's disease (Lerche et al., 2018). This again highlights the role of PA as a disease modifier.

Sport and physical activity have long-standing ties with education. In Ancient Greece and Rome, for example, physical education for males was directed toward cultivating the perfect human body and training for military purposes (Fuld, 1907). In modern times, the development and spread of many sports and physical disciplines—as diverse as football and rugby codes, gymnastics, cricket, boxing, track and field, judo—are rooted in their practice in schools, colleges and universities in different parts of the world (Mangan, 1986). The subsequent embedding of physical education in modern school curricula reflects state, scientific and practitioner focus on the educational and health benefits of physical activity (Bailey et al., 2009).

Scientific research indicates that physical activity (PA) and cardiorespiratory fitness are associated with a variety of health benefits for children and adolescents (Janssen and LeBlanc, 2010). In addition to the benefits on physical and mental health, studies in neuroscience have shown that PA has positive effects on brain structure and function (Chaddock et al., 2012). Exercise interventions thus have a positive effect on the cognitive performance of children (Hill et al., 2011). The level of PA is positively associated with cognition and academic achievement in children (Lees and Hopkins, 2013) and adolescents (Esteban-Cornejo et al., 2015). Children with higher cardiorespiratory fitness are more successful academically (Marques et al., 2018).

However, during the transition from childhood to adolescence, a marked decrease occurs in the proportion of individuals who meet minimum PA recommendations. Physical education (PE) experiences may contribute to this change. Among many factors, one of the most potentially influential is the exposure to, and the experiences associated with PE at school (Mura et al., 2015). For many children, PE may be the only opportunity for regular PA, making it essential that it is delivered in a manner that encourages lifelong PA. Sadly, during adolescence, for many children, their attitudes toward PE begin to become more negative (Mercier et al., 2017). Childhood memories of PE are associated with PA attitude, intention, and sedentary or active behavior in adulthood (Ladwig et al., 2018).

Social scientists have long highlighted how social divisions—notably class, gender, ethnicity, and (dis)ability—shape young people's access to, and experiences of, sport and PA in educational settings (Evans, 1993). Thus, in market-based societies, private schools, and elite universities offer far more extensive and better quality sport training and facilities than state schools can provide; more broadly, in most societies, girls, ethnic minority groups, and people with disabilities, continue to experience different types of marginalization and lack of sporting provisions within educational settings (Stidder and Hayes, 2013; Collins and Kay, 2014).

At the same time, schools, NGOs, governmental bodies, and sport organizations have turned to use sport and physical activities as a hook for drawing young people into education and training, and as tools for educational messages in different areas of personal and social development, such as on health, gender empowerment, and promoting the inclusion of ethnic minorities (Holt, 2016; Collison et al., 2019). Some research has argued for “critical pedagogies” within physical education, to promote critical reflection and social change among young learners (Fitzpatrick, 2013).

There is a large body of evidence that regular exercise improves emotional experiences and well-being (Nagamatsu et al., 2014; Hallgren et al., 2016). Immediately after engaging in PA, participants report feeling more positive (e.g., more energy and vigor) (Reed and Ones, 2006) and less negative (e.g., less fatigue and anxiety) (Youngstedt, 2010). Exercise is also known as an effective counterbalance measure against depression. PA is commonly recommended as part of treatment for those suffering from emotional disorders (Walsh, 2011). In elderly patients, a larger remission of latelife major depression was observed when following a pharmacological treatment combined with aerobic exercise, showing that physical exercise is safe and adds effective antidepressant effects (Belvederi Murri et al., 2015).

Moreover, feeling good after PA may promote more PA over time and subsequently positive Emotions that are important predictors of life “resources”—psychological (e.g., environmental mastery), social (e.g., social bonds), or cognitive (e.g., creativity)—(Fredrickson, 1998). In other words, being active helps to keep an active life in many areas.

Investigating the mechanisms and applications of performance enhancement in athletes is an important area in sport sciences. There is a large cohort of specialists (coach, exercise physiologist, psychologist, data analyst, physiotherapist, conditioning coach, mental trainer, sport physician, biomechanist, nutritionist, recovery specialist, …) working as the “team behind the team” to enhance sport performance, prevent decrements in performance and enhance recovery of athletes. These multi-disciplinary staff members try to follow an evidence-based approach integrating the best relevant research evidence into the decision-making process for the service delivery to athletes.

Unfortunately, there are remaining gaps between scientists and practitioners with difficulties for implementing scientific results into practice (Stoszkowski and Collins, 2016; Halperin et al., 2018). One effective way to bridge the gap between exercise scientists and coaches may be to implement qualitative research (Halperin, 2018). A good example of fruitful collaboration might arise from case studies, especially for reporting exceptional performance or athlete characteristics (Schmitt et al., 2016).

Sport, tourism and other fields of active living are commercial sectors that have grown rapidly over the past few decades. Industry analysts have valued the global sport market at around US$600-700 billion, or around 1% of global GDP (KPMG, 2016); the burgeoning fitness and mind-body industries at US$595 billion (Global Wellness Institute, 2018); and, the global travel and tourism industries at US$8,272 billion (World Travel and Tourism Council, 2018). Sport's commercial value is most clearly demonstrated at the elite level, for example as the world's 50 most valuable clubs—such as Dallas Cowboys (American football), New York Yankees (baseball), and Manchester United and Real Madrid (association football or soccer)—are worth a combined US$137 billion.

The commercial expansion of the sport and active living sectors is manifested in a variety of ways. As global sectors, they increasingly interconnect diverse communities, cities, nations and regions. They encompass a panoply of products and services, not only in sporting events and infrastructure, but also in science and technology, fashion and merchandise, media, education, and even the “happiness” industries (Davies, 2015). They include many fields of employment, such as in sport and leisure management, marketing, business, communication, education, innovation, analytics, and engineering. They produce new technologies such as wearable devices for physical and psychological health, smartphone apps, software for performance analysis, and gaming media. These rapid developments inspire critical investigation and inquiry by academics. For example, wearable technologies raise various issues and concerns regarding constant self-monitoring, obsessions with health, and the confidentiality and scientific quality of data that is generated (Van den Bulck, 2015; Halson et al., 2016; Sperlich et al., 2017; Baron et al., 2018). In addition, their transnational expansion leads to concerns over how sport and active living industries may feed on or exacerbate global inequalities or human rights abuses, for example in the exploitation of employees in sport merchandise factories or on stadium construction sites; and, the decline of local sport clubs and competitions in the global South due to the transnational appeal of glamorous sport events in the global North (Giulianotti and Robertson, 2009; Sage, 2010; Brannagan and Giulianotti, 2015).

Sport and physical culture have the deepest historical roots. Different sporting forms were practiced by ancient civilizations, notably by the Greeks and Romans, as well as the Egyptian, Mesoamerican and other peoples, often as part of their religious rituals (Guttmann, 2004). From the Eighteenth century onwards, the emergence and transnational spread of association football, rugby, cricket, baseball, basketball, and other modern organized sports depended heavily on British and then American international dominance (Holt, 1989; Guttmann, 1994). Modern sports emerged and developed alongside wider processes of modernization, notably the making of modern capitalism, colonialism and post-colonialism, nationalism, conflict and war, international society, industrialization and urbanization, rationalization and bureaucratization, and diverse social divisions along the lines of class, caste, gender, sexuality, “race” and ethnicity, and [dis]ability (Hargreaves, 1994; Carrington, 2010; Gruneau, 2018).

At everyday level, sport and activity groups facilitate the making and remaking of personal and collective identities, and social relations, ties and obligations, across members and participants. At national and transnational levels, sport events often generate high spectatorships and the largest television audiences (Whannel, 2009). Competitive sports also dramatize and, at times, amplify rivalries and oppositions between different competitors, communities and societies (Armstrong and Giulianotti, 2001).

Sports and physical cultures tend to carry strong cultural meanings and aesthetic qualities for their practitioners and audiences, such as in symbolizing identities and communities, or in capturing the “grace” of the body at play (Besnier et al., 2017). Sports and active living enable different societies to display their cultural histories, symbols, values and identities before different audiences, such as through hosting the opening ceremonies at the Olympics and other sport mega-events (Traganou, 2010). They are also a field of growing importance for artists, writers, musicians, dancers, and others working creatively in the humanities and arts.

Sport and active living harbor strong political dimensions, where competing interests come into play, for example, between powerful groups (typically male, white, heterosexual, middle or upper class, global North), nations and corporations which dominate sports, and diverse dominated groups that pursue full sporting participation (Sage, 2010; Giulianotti, 2015). The politics of sport governance have also intensified due to a widening of the array of political stakeholders (such as club owners, athletes, states, corporate sponsors, and fans), and also due to recent corruption scandals in FIFA and other sport bodies (Donnelly, 2015; Jennings, 2015).

Thus, we see that sport and active living interconnect very substantially with these fields, in medicine, education, happiness, performance, business and innovation, history, society, culture, and politics. This journal is committed to identifying and addressing the critical scientific challenges that arise in sport and active living across these diverse fields. Our aim is that, in doing so, the journal will become a prominent vehicle, for advancing global debates across the natural and social sciences, and for developing appropriate recommendations in policy and practice, on sport and active living, in making a more sustainable world.

It gives us great pleasure to introduce the new journal, Frontiers in Sports and Active Living. This open-access journal publishes rigorously peer-reviewed research that advances our understanding of all aspects of sports, physical activity, exercise training; in other words, of active living, of non-sedentary behavior. As Field Chief Editors, we have the enormous benefit of being supported by an outstanding Editorial Board of international researchers.

We are committed to ensuring that this multidisciplinary journal will be at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to researchers, academics, policy-makers, and the public worldwide. To this end, Frontiers in Sports and Active Living has developed a number of specialties that clearly outline our research areas. We particularly welcome new ideas and approaches that are likely to shift paradigms in our understandings of sport, exercise, and active living.

The journal will register and explore how sports, exercise, and active living permeate all aspects of society. Being active and mobile is for physical health (Exercise is medicine), for mental health (Exercise is happiness), for learning (Exercise is education), for the economy (Exercise is business), for technological development (Exercise is innovation), and for the environment (Exercise for a clean planet). In exploring these and other themes, which we elaborate on below, the journal seeks to contribute to developing a sustainable world, and in the process will join forces with other Fields within the Frontiers domain.

All authors listed have made a substantial, direct and intellectual contribution to the work, and approved it for publication.