Hardly any adolescents met recommendations for sleep, physical activity, and screen time exposure, federal survey data from 2011-2017 indicated.
Among nearly 60,000 teens from the Youth Risk and Behavior Surveillance Survey, just 7% of boys and 3% of girls met recommendations for all three factors, and overall, just 5% did (95% CI 4.6%-5.4%), reported Gregory Knell, PhD, of UTHealth School of Public Health in Dallas, and colleagues.
Compared to kids 14 or younger, 16-year-olds were about 23% less likely to get the proper amount of sleep, screen time, and physical activity, and 17-year-olds were 46% less likely, they wrote in JAMA Psychiatry.
While the effects of sleep, screen time, and physical activity on health behaviors have been extensively studied independently, their cumulative effects have not been researched as thoroughly, Knell told MedPage Today.
Knell and colleagues drew their benchmark goals for the three behaviors from recommendations in 2009 that children ages 6-12 sleep 9 to 12 hours per day and teens ages 14-18 sleep 8 to 10 hours per day; children of all ages should have at least 1 hour of moderate or vigorous exercise; and they should limit screen time to no more than 2 hours per day.
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