The increasing prevalence of primary hypertension in children and adolescents is a significant global health issue. While approximately four percent of six-year-olds are affected, this rate rises substantially among obese adolescents, with nearly one in six experiencing hypertension (1). Among the various risk factors associated with adolescent hypertension, sleep problems, particularly inadequate sleep duration, have been consistently linked to its development (2, 3). It is generally recommended that adolescents aged 13-18 get 8-10 hours of sleep per day (4); however, the average sleep duration for American teenagers ranges from 7.5 to 8.5 hours daily (5), with many getting less than 7 hours on school nights (6).

Hypertension in adolescents is an increasingly prevalent public health issue with substantial implications for future cardiovascular health. Insufficient sleep has been identified as a key modifiable factor associated with elevated blood pressure, particularly among youth. Adolescents frequently experience limited sleep on weekdays due to early school start times and social obligations, often attempting to compensate by sleeping longer on weekends. This pattern, known as the weekday-weekend sleep duration gap (WWSDG), reflects the difference between average sleep duration on weekdays and weekends. A survey of middle-aged adults in Korea revealed that catching up on sleep over the weekend was associated with a reduced risk of hypertension (7).

Recent research, however, challenges the assumption that extended weekend sleep can effectively counterbalance the adverse effects of insufficient weekday sleep. Studies by Putilov and colleagues have demonstrated that weekend sleep extension may not significantly restore health markers compromised by weekday sleep loss. Furthermore, analyses separating weekday sleep duration from the WWSDG suggest that weekday sleep itself, rather than the variability between weekday and weekend sleep, is a primary contributor to health outcomes (8, 9).

In light of these findings, this study investigates the independent associations of weekday sleep duration and WWSDG with hypertension in a representative sample of American adolescents. By analyzing these sleep variables separately, we aim to clarify whether WWSDG has a distinct relationship with hypertension risk.

This study aligns with recent evidence suggesting that the concept of “catch-up sleep” on weekends may not effectively mitigate the health risks associated with sleep deprivation accumulated during the week. Studies have questioned the physiological efficacy of weekend sleep extension as a means of “catching up” on lost sleep. For example, Putilov et al. demonstrated through sleep-wake cycle simulations that individuals do not significantly extend their sleep durations on weekends to compensate for weekday deficits (11)​. Furthermore, a recent study on university students found that health outcomes attributed to the WWSDG became statistically insignificant after controlling for weekday sleep duration, further underscoring the limited role of weekend sleep extension as a recovery mechanism (8)​.

Our findings reinforce the significance of sufficient weekday sleep for cardiovascular health in adolescents. Consistent with previous studies, we observed a higher hypertension risk in adolescents with weekday sleep durations below the recommended 8 hours. Insufficient sleep may contribute to hypertension through mechanisms such as increased sympathetic nervous activity, impaired glucose metabolism, and systemic inflammation. Unlike WWSDG, which merely reflects variability in sleep patterns, weekday sleep duration directly impacts the body’s physiological processes and may serve as a more reliable indicator of hypertension risk. These findings suggest that interventions should prioritize consistent sleep schedules and adequate weekday sleep over strategies focused solely on weekend sleep compensation.

Our research investigated the relationship between average weekday sleep duration, WWSDG, and the risk of hypertension in American teenagers. Our findings showed a direct link between short weekday sleep duration (less than 8 hours per night) and an increased risk of hypertension (OR = 1.092; 95% CI = 1.042-1.144). This aligns with recent epidemiological studies identifying a correlation between sleep patterns and hypertension. A study on Lithuanian adolescents aged 12 to 15 years found a significant relationship between insufficient sleep duration (less than 8 hours per day) and a higher prevalence of prehypertension and hypertension. Specifically, individuals who slept less than 7 hours daily had higher odds of high blood pressure (OR = 2.18 for prehypertension and 2.28 for hypertension) (12). In a study of 246 black and white adolescents (mean age = 15.7 years), wrist actigraphy over one week showed that shorter sleep durations were associated with higher 48-hour blood pressure, especially at night, resulting in a higher systolic blood pressure sleep/wake ratio. These associations were more pronounced among white adolescents (13). Among a cohort of 143 healthy-weight teenagers, a 7-day sleep diary indicated that inadequate sleep duration was associated with elevated systolic and diastolic blood pressure levels observed during various periods around nocturnal polysomnography (14). Polysomnography-determined sleep efficiency and total sleep time were inversely linked to blood pressure levels. However, occasional adequate sleep did not fully mitigate the risk of high blood pressure due to chronic sleep deprivation.

The mechanisms linking insufficient sleep and high blood pressure are not fully understood, but they involve factors such as the autonomic nervous system, inflammation, endothelial dysfunction, and circadian rhythm disruption. Sleep deprivation increases sympathetic activity and decreases parasympathetic activity, raising blood pressure. Research shows 24 hours of sleep deprivation raises blood pressure in young men, and similar deprivation increases systolic blood pressure in older adults, especially women (15). Sleep deprivation disrupts heart rate variability, impairing baroreflex function and raising blood pressure (16). Chronic sleep restriction activates inflammatory pathways, causing neuroinflammation and endothelial dysfunction (17, 18). Circadian rhythm disruption affects blood pressure regulation. Genes like Bmal1, Clock, Period, and Cryptochrome manage blood pressure, and their disturbances cause oxidative stress and inflammation, leading to hypertension (19). Research on shift workers and animals shows circadian disruption impacts blood pressure through these mechanisms.

Prior research has investigated the connection between WWSDG and hypertension. For instance, a study in South Korea found that an additional hour of sleep on weekends decreased the risk of developing hypertension by 17% across the general population and by 39% among individuals with insufficient sleep (7). Another study examined the impact of sleep duration, oversleeping, and weight on blood pressure in adolescents. An analysis of 327 children over two exam cycles showed that inadequate sleep, particularly on school nights, correlated with higher body weight and blood pressure, while oversleeping showed no such associations (20). Adolescents often experience a natural shift in their sleep patterns, staying up and waking up later due to biological and psychosocial influences such as social activities, academic demands, and technology use (21). However, early school start times and extracurricular commitments can disrupt these patterns, leading to sleep debt often compensated for by sleeping in on weekends. Discrepancies in sleep habits and living circumstances between youths and adults further complicate comparisons. Long-term studies focusing on children and adolescents are necessary to confirm the potential link between WWSDG and hypertension.

In analyzing WWSDG, we noted the presence of negative values in some cases, indicating shorter weekend sleep relative to weekdays. Such patterns may reflect individual lifestyle factors or circadian preferences rather than compensatory sleep behavior. For instance, adolescents with rigorous weekend schedules or social engagements may not extend their sleep on weekends, which results in a negative WWSDG. This variability highlights the importance of considering both lifestyle and circadian influences when interpreting WWSDG data.

This research is significant in its analysis of the correlation between weekend catch-up sleep and adolescent hypertension using data from NHANES. The data, derived from a substantial survey sample and weighted to reflect the general population, provide insights applicable to the broader demographic of American adolescents. Nonetheless, certain limitations must be acknowledged when interpreting the results. One primary constraint is the inability of our study to definitively establish a causal link between weekend catch-up sleep and hypertension due to its cross-sectional design. However, the findings do present opportunities for future longitudinal research to explore causal relationships. Additionally, the self-reported nature of adolescents’ sleep duration using a single unvalidated item is another limitation. While this method is commonly employed in population studies, there is a possibility of overestimation in self-reported sleep duration.

This study underscores the importance of promoting regular and sufficient sleep throughout the week for adolescent health. While adolescents may attempt to “catch up” on sleep during weekends, our findings suggest that such efforts may not mitigate the health risks associated with chronic weekday sleep loss. Public health campaigns and school policies should focus on promoting sleep hygiene practices that encourage adequate weekday sleep to reduce the risk of hypertension and other health complications in youth.

Future research should continue to explore the physiological impacts of sleep variability and assess whether other health outcomes are similarly unaffected by weekend sleep compensation. Longitudinal studies may provide further insights into how weekday sleep and WWSDG patterns develop over time and their long-term impact on cardiovascular health.

In conclusion, this study underscores the critical role of consistent and sufficient weekday sleep in mitigating the risk of hypertension among adolescents. The findings reveal that inadequate sleep during weekdays significantly heightens hypertension risk, while attempts to compensate for this deficit through weekend catch-up sleep provide no meaningful protective benefit. Longer total weekly sleep duration was associated with a reduced risk, highlighting the value of a stable sleep pattern throughout the week. Efforts to improve adolescent cardiovascular health should prioritize promoting regular and adequate sleep schedules, rather than relying on compensatory sleep strategies. Further longitudinal studies are warranted to explore causal relationships and assess the broader health implications of sleep variability.