Later school start times for teens could optimize academics and safety
In 2014, The American Academy of Pediatrics (AAP) recommended that secondary schools start no earlier than 8:30 a.m. to accommodate teenagers' changing biological sleep cycles, which dictate later sleeping and waking times. The AAP cited studies finding that teens who don't get enough sleep demonstrate poor academic performance and a higher risk of auto accidents. Further, getting the nine hours of sleep recommended for teens becomes a challenge in adolescence when sleep cycles make it difficult for teens to fall asleep before11:00 p.m.

A group of sleep researchers from Harvard University, Oxford University, and the University of Nevada recently made their own recommendations that school start times for teens should synchronize with their biology, ideally calling for classes to start at 10:00 a.m. for 16-year-olds and 11:00 a.m. for 18-year-olds. They stated that a 7:00 a.m. wake time for teens is equivalent to a 4:30 a.m. wake time for a teacher in their 50s. The authors explained that the biological changes requiring teens to both sleep and wake later coupled with the early start times of most schools in the U.S. leads to 2-3 hours of sleep loss every day. This amount of sleep deprivation hinders memory, metabolism, and psychological health.
The authors describe several studies of later start times, which consistently show health and academic benefits for students. As public interest grows in later start times, many districts attribute transportation and other logistical costs as the factor hindering these changes. The authors urge policymakers to consider that later start times are indeed less expensive to implement than most other interventions to improve teen health and academic achievement.

Johns Hopkins University 

Research in Brief

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