According to the National Sleep Foundation and the American Academy of Sleep Medicine, most teens get less than eight, especially on school nights, even though they need eight to 10 hours of sleep per night to maintain physical health, mental well-being and school performance. Stephanie J. Crowley, PhD, associate professor of psychiatry and behavioural sciences and the director of the Pediatric Chronobiology and Sleep Research Program at RUSH said, "There are a lot of changes a teen goes through. One specifically is a change to sleep biology that happens during puberty.” Crowley further added, "The brain systems that control sleep change in such a way that it’s easier for an adolescent to stay awake later into the evening. One of these systems — the 24-hour circadian clock — shif
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