Irregular Sleep and Late Bedtimes Associated with Worse Grades for High School Students

The following is excerpted from an online article posted by the National Institutes of Health.

Irregular sleep and late bedtimes are linked to worse grades and more school-related behavioral problems among teens, suggests a study funded by the National Institutes of Health (NIH). The authors stated that interventions to promote regular sleep schedules may boost adolescents’ academic performance.

The study, conducted by Gina Marie Mathew, Ph.D., and Lauren Hale, Ph.D., of Stony Brook University and colleagues, appears in Sleep. Funding was provided by NIH’s Eunice Kennedy Shriver National Institute of Child Health and Human Development.

Researchers analyzed data from nearly 800 adolescents participating in a larger study. Participants provided information on grades and school-related behavioral issues. They also wore a wrist accelerometer (a device that records the wearer’s movements) for a week so that study staff could estimate their sleep patterns.

Participants with more variable bedtimes had a greater chance of receiving a D or lower during the last grading period, compared to those with more consistent bedtimes. Adolescents who went to bed later, got up later or varied the number of hours they slept per night had fewer classes in which they received an A. Adolescents were more likely to be suspended or expelled in the last two years if they got up later, varied the number of hours they slept each night or if they varied the time they went to bed each night.

Source: National Institutes of Health

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[reposted by] Jim Liebelt

Jim is Senior Writer, Editor and Researcher for HomeWord. Jim has 40 years of experience as a youth and family ministry specialist, having served over the years as a pastor, author, consultant, mentor, trainer, college instructor, and speaker. Jim’s HomeWord culture blog also appears on and Jim and his wife Jenny live in Quincy, MA.

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