Hardly any adolescents met recommendations for sleep, physical activity, and screen time exposure, federal survey data from 2011-2017 indicated.
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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.

It turns out the old saying about sticks and stones breaking bones but words never hurting is bunk.
According to research newly published in the peer-reviewed Early Childhood Research Quarterly, emotional bullying in the preschool years hurts quite a lot. When a child both bullies and gets bullied, the findings are especially clear: Depression symptoms begin to appear as early as age 3. Depression in early childhood increases the risk of depression in later childhood, which predicts depression in adolescence.
Bullying by young children is “very obvious,” said Tracy Vaillancourt, a professor of child psychology at the University of Ottawa and co-author of the study. “They’re not very good at it but it’s still very effective.”

Two- to 3-year-old preschool students engage in emotional bullying by refusing to let certain classmates sit by them, threatening to withhold their friendship from others, blocking classmates out by turning their backs or even just closing their eyes and covering their ears. Stating that so-and-so “can’t come to my birthday party” is and especially common weapon, Vaillancourt said.