After-School Programs Get Kids Moving, But Children Still Fall Short on Sleep

Every afternoon across the United States, roughly 7.7 million children head from the classroom into after-school programs, where they play games, complete homework, and spend time with friends. A new study suggests those hours matter far more for children’s health than many parents might realize. Researchers at Arizona State University have found that elementary school children attending after-school programs in Arizona were almost universally meeting the national recommendation of at least 60 minutes of daily moderate-to-vigorous physical activity, a benchmark that most American youth fail to reach. Yet the same research uncovered a striking and troubling contrast: not a single child in the study met the recommended sleep duration of 9 to 12 hours per night, and only about 40 percent achieved optimal sleep efficiency. The findings, published in the Journal of Activity, Sedentary and Sleep Behaviors, offer one of the first combined portraits of physical activity and sleep among children in after-school settings, and they carry a clear message for educators and parents alike: structured programs can powerfully support movement, but they cannot fix sleep on their own.

The study, led by Umar Abubakar Hassan and colleagues including Adewale Luqman Oyeyemi, Kylie Wilson, Pamela Hodges Kulinna, and Allison Poulos, focused on 72 children aged 8 to 12 years in grades 3 through 6. These children attended fee-based after-school programs at 14 elementary schools in a public school district in Maricopa County, Arizona. The programs offered a mix of recreation, games, academic support, and arts and crafts, running roughly three hours each weekday from about 3:00 p.m. to 6:00 p.m. None of the programs was specifically designed to promote physical activity, which makes the activity findings all the more notable. To capture what children actually did throughout the day and night, each participant wore a wrist-mounted ActiGraph GT3X+ or GT9X Link accelerometer for ten consecutive days in October 2022, removing the device only for water-based activities.

The technical demands of measuring both movement and sleep in free-living children are considerable, and the researchers followed rigorous protocols to ensure their estimates were trustworthy. Accelerometers were initialized at 50 Hz and data were processed in 60-second epochs using ActiLife software. Periods of non-wear were identified using the Choi algorithm, which flags sustained inactivity of at least 90 consecutive minutes, allowing up to two minutes of sporadic counts. To qualify for analysis, children needed at least four valid days, three weekdays and one weekend day, with a minimum of 10 hours of wear time each day. Physical activity intensity was classified using cut points developed by Chandler and colleagues, which were specifically validated for wrist-worn accelerometers in children aged 8 to 12. Sleep scoring relied on the Sadeh algorithm, which classifies each minute as sleep or wake based on activity counts within an 11-minute moving window, with sleep onset and offset determined by visual inspection of activity graphs.

Out of 382 children invited to participate, 153 provided consent, and 72 met the stringent wear-time criteria for the final analysis. The results on the activity side were remarkable. Nearly all participants, 99 percent, met the daily guideline of at least 60 minutes of moderate-to-vigorous physical activity averaged across all days, including weekends, where 93 percent still met the target. Children accumulated an average of roughly two hours of moderate-to-vigorous activity per day, drawing on time before school, during physical education and recess, and after dismissal. During the after-school programs themselves, children attended for an average of 179 minutes and accrued about 35 minutes of moderate-to-vigorous activity. That figure represents more than half of the 60-minute daily requirement, confirming that these programs make a meaningful, quantifiable contribution to children’s movement even when they are not explicitly designed for exercise.

Perhaps the most surprising discovery came from an exploratory reanalysis. When the researchers recalculated daily activity after stripping out the 35 minutes accumulated during after-school programming, they found that 93 percent of children still met the 60-minute guideline. This suggests the children in this sample were highly active outside of structured programming as well, likely through active commuting, recess, physical education, and free play. The authors caution that this unusually active population may partly reflect the study’s baseline sample, which was drawn from a larger intervention trial, and the fact that the fee-based nature of the programs may have favored children from higher-income households with more resources for weekend activities and sports. Nevertheless, the finding underscores that after-school hours are a valuable lever for supporting daily activity, particularly on weekdays when children’s routines are most structured.

The sleep results told a very different story. On average, children slept just over seven hours per night, far below the 9-to-12-hour range recommended by the American Academy of Sleep Medicine and the National Sleep Foundation for children aged 6 to 12. Not one child met the sleep duration guideline on any day type, weekdays, weekends, or overall. The arithmetic behind this failure is revealing: children averaged only about 8 hours and 33 minutes of total time in bed, which is insufficient even before accounting for sleep latency and nighttime awakenings. In other words, the problem begins with bedtime itself. Children were simply not spending enough time in bed to achieve nine hours of sleep, a shortfall the authors attribute in part to factors such as evening screen time, inconsistent bedtime routines, homework, video games, and environmental disruptions like noise or bedroom sharing, which are more common in lower-income neighborhoods.

Sleep efficiency, defined as the percentage of time in bed actually spent asleep, painted a moderately better but still concerning picture. The National Sleep Foundation recommends that school-aged children achieve at least 85 percent sleep efficiency, yet only about 40 percent of participants reached that threshold across all days. The average sleep efficiency was 83 percent. Interestingly, girls showed higher physical activity levels, longer sleep duration, and better sleep efficiency than boys across all day types, a pattern that ran counter to the researchers’ initial hypotheses and to some prior literature. Fisher’s exact tests found no statistically significant differences in guideline adherence by age, gender, or school-level income, though the authors note that with 99 percent meeting the activity guideline and zero percent meeting the sleep duration guideline, there was little variability left to detect.

The study does have limitations that warrant careful interpretation. Wrist-worn accelerometers can overestimate moderate-to-vigorous activity in children because upper-limb movements inflate activity counts, while visual sleep scoring may underestimate true sleep duration by misclassifying quiet wakefulness, and the sleep data did not capture daytime naps. The strict wear-time criteria excluded roughly 40 percent of consenting participants, the sample size was modest, the observational analysis was nested within a larger intervention trial and was not powered for these specific outcomes, and the study did not account for clustering by school. School-level income, measured through Title I status, served only as a proxy for individual socioeconomic status. These constraints limit generalizability, but the authors argue the device-based measurement of both activity and sleep in this population represents a genuine strength and provides critical preliminary data for future research.

The broader implications of the findings extend well beyond Arizona. Chronic insufficient sleep in childhood is linked to disrupted attention and memory, emotional and behavioral difficulties, and elevated risks of obesity and other physical health problems, undermining academic success and well-being. Prior evidence consistently shows that meeting physical activity guidelines improves the odds of good sleep quality, and indeed, among the small number of children in this study who failed to meet the activity guideline on weekends, 80 percent had poor sleep quality. The authors suggest that after-school programs could evolve beyond their focus on physical activity to actively promote healthy sleep, for example by helping children finish homework earlier, reducing evening screen exposure, and encouraging consistent wind-down routines. They also call for research comparing sleep on days when children do and do not attend after-school programs. For now, the takeaway is clear: structured after-school hours are a proven engine for keeping children active, but ensuring children get enough sleep remains a challenge that families, schools, and communities must tackle together.

Subject of Research: Physical activity and sleep patterns among elementary school children attending after-school programs in Arizona

Article Title: Physical activity and sleep patterns in children attending after-school programs in Arizona: a cross-sectional study

Article References: Hassan, U. A., Oyeyemi, A. L., Wilson, K., Kulinna, P. H., & Poulos, A. (2026). Physical activity and sleep patterns in children attending after-school programs in Arizona: a cross-sectional study. Journal of Activity, Sedentary and Sleep Behaviors, 5(1), Article 7. https://doi.org/10.1186/s44167-025-00093-9

Image Credits: AI Generated

DOI: 10.1186/s44167-025-00093-9

Keywords: physical activity, sleep, after-school programs, children, moderate-to-vigorous physical activity, sleep efficiency, accelerometers, MVPA guidelines, sleep duration, elementary school, child health, Arizona