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Teens Sleep Longer and Do Better When School Starts Later

Published on June 23, 2026, 7:06 p.m.
Teens Sleep Longer and Do Better When School Starts Later

Topic: Health

Researchers found that when high school students can choose their own start times, they sleep more and perform better. This is because teenagers' bodies naturally shift later in the day.

The problem with early morning classes for many teens is not just about waking up early. It's about biology. During adolescence, the body's internal clock shifts later, making teenagers feel alert later at night than adults do. Because of this shift, many teens cannot fall asleep early enough to get sufficient rest before school.

This can lead to sleep deprivation, which affects well-being, mental health, physical development, and the ability to learn. Oskar Jenni from the University of Zurich explains that teenagers' natural sleep patterns prevent them from going to bed early enough to meet their sleep needs. Allowing school to start later in the morning could offer meaningful benefits.

Researchers Joëlle Albrecht, Reto Huber, and Oskar Jenni tested flexible school start times at Gossau Upper Secondary School. They found that 95% of students chose to start school later when given the option. On average, they started their day 38 minutes later than before. As a result, students woke up about 40 minutes later in the morning.

The extra sleep led to improvements in sleep quality and overall well-being. Students reported fewer problems falling asleep, and health-related quality of life increased. Academic performance also improved, with better outcomes in English and mathematics.

Why It Matters

This study matters because it shows that giving teenagers more control over their school schedules can improve their mental and physical health, as well as their academic performance. This is especially important in India, where students often face pressure to perform well academically and may struggle with sleep deprivation.

Key Facts

  • 95% of students chose to start school later when given the option
  • Students started their day an average of 38 minutes later than before
  • The extra sleep led to improvements in sleep quality and overall well-being
  • Academic performance improved, with better outcomes in English and mathematics

Key Terms

adolescence
the period of life from puberty to young adulthood

Implications

This study matters because it shows that giving teenagers more control over their school schedules can improve their mental and physical health, as well as their academic performance. This is especially important in India, where students often face pressure to perform well academically and may struggle with sleep deprivation.


Source: https://www.sciencedaily.com/releases/2026/03/260311004725.htm

Journal Reference:

  1. Joëlle N. Albrecht, Alessa Risch, Reto Huber, Oskar G. Jenni. The Power of Flexible School Start Times:. Journal of Adolescent Health, 2026; DOI: 10.1016/j.jadohealth.2026.01.011

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