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The incidence of depression among teens significantly rises with less than nine hours of sleep.
Around half of teens who sleep four hours or less per night feel sad and hopeless, compared to just 19 percent of their well-rested peers.
Medical researchers have also found that sleep patterns of younger children enable them to rise early and be ready for learning much earlier than adolescents.
In other words, the biology of the teenage brain is in direct conflict with school schedules, which typically require adolescents to begin school earlier and younger children to start later.
In preteens and adults, the secretion of melatonin is flexible and variable, and sleep timing preferences are genetically based.Districts across the country have wrestled with the question of whether their local high school should start later.I’ve been studying the effects of later high school start times for 20 years.In fact, as late as 1910, half of all children attended one-room schools.As schools and districts grew in size in the early 1930s, staggered starting times became increasingly common.
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Since 2014, however, major national health organizations have taken a policy stand to support the implementation of later starting times for high school.