Later School Start Times Improved Adolescent Alertness: Page 2 of 2

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July 6, 2010

and pathologically sleepy." The study found that there was a significant average increase in sleep duration on school nights of 45 minutes across all grades (nine to 12) after the change in the school start time. The self report showed drastic declines in the percent of students who felt they "rarely/never" got enough sleep (69 percent to 34 percent), and those reporting "never" being satisfied with their sleep (37 to 9 percent). The consequences of sleep deprivation are far-reaching: impairments in mood, attention and memory, behavior control and quality of life; lower academic performance and a decreased motivation to learn; and health-related effects including increased risk of weight-gain, lack of exercise and use of stimulants. Learn more about the benefits of delaying school start times .