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Do schools really need to commence classes before 8:30 a.m.? A recent study suggests otherwise, particularly for high school students.
Getting teens out of bed early can often feel like an uphill battle, so it’s no surprise that starting school at 8:30 a.m. or later not only helps them arrive on time but also promotes better physical and mental health. New research reinforces this notion.
Published in the journal Sleep, the study analyzed responses from approximately 28,000 students in a varied Colorado school district that adjusted its start times to allow students, especially pre-teens and teens, more sleep. Over a two-year period, this change yielded positive results.
The survey revealed that while elementary students’ sleep patterns remained unchanged, there was a notable increase in the percentage of middle and high school students reporting sufficient sleep. Furthermore, daytime sleepiness significantly decreased among these older students.
On average, the new school schedule allowed students to gain about 45 minutes more sleep. Elementary students started school an hour earlier to accommodate the change, as explained by Dr. Jenna Hartley, a pediatric psychologist with National Jewish Health in Colorado. Middle schools adjusted their start times by 40 to 60 minutes, while high schools began classes 70 minutes later, aligning with or after 8:30 a.m.
“Adjusting the start times for middle and high schools is a crucial health policy that effectively alleviates adolescent sleep deprivation with minimal disruption to younger students,” Dr. Hartley emphasized. Middle school students went to bed about nine minutes later and enjoyed an additional 37 minutes of sleep, while high schoolers went to bed 14 minutes later, gaining an extra hour of sleep and approximately 46 minutes on average per school day — totaling around four more hours of sleep weekly.
Dr. Mark Thomas, an associate professor of psychiatry at the University of Pittsburgh, noted that this schedule better syncs with teens’ natural biological rhythms. Insufficient sleep can hinder their ability to learn and adversely affect mental and physical well-being.
The CDC has long advocated for later school start times, asserting on their website that “schools start too early.” Currently, fewer than 21% of middle and 18% of high schools in the U.S. begin classes at 8:30 a.m. or later.
“Lack of sleep is prevalent among high school students and is linked to several health risks, including obesity, substance abuse, and poor academic performance,” the CDC warns.
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Summary
A new study suggests that delaying school start times improves sleep quality for middle and high school students, aligning better with their biological clocks. Increasing sleep duration positively influences their health and academic performance.
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