It has long been known that insufficient sleep is related to academic and emotional functioning in adolescents. New research shows that irregular sleep habits are harmful as well.
Most studies of sleep insufficiency have focused on sleep duration.Adolescents should try to go to bed and wake up at about the same time every day.
In two previous posts, I have written about the importance of night-to-night regularity of sleep timing for children and adolescents. I described studies thatThe links between poor sleep and academic performance have been known for a long time. Most research on how sleep relates to academic performance in children and adolescents has emphasized the need for sufficient sleep duration. A new study confirms that the regularity of sleep timing and duration are related to academic performance.
In a large national sample of teens, Gina Mathews and colleagues analyzed multiple sleep dimensions through one week of actigraphy as they related to school grades and the frequency of being suspended or expelled. The researchers studied sleep factors including duration, bedtimes and wake times, sleep quality, and variability.for different durations.
These are not the first studies to show the importance of sleep regularity. In studies from our own lab, we have found similar results . So why would regularity have these effects? The central clock in the midbrain regulates the circadian cycle of sleep and wake. During sleep, many bodily functions change. Heart rate and blood pressure drop, breathing slows, changes take place in metabolism, and memories are consolidated.
More recently, timing mechanisms have been discovered in many physiological systems. For example, they have been found in the digestive system, where they regulate glucose homeostasis and the metabolism of fats and bile.
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