Later school bells: can a simple schedule change boost teen health?
NCT ID NCT06657482
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 2 times
Summary
This completed study in Norway looked at whether delaying school start times by one to two hours on Mondays and Tuesdays helps high school students sleep longer, feel less sleepy during the day, and improve their mental health and grades. Over 580 first-year students participated. The goal was to see if a simple schedule change could make a real difference in teens' well-being.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- Active substance
- delayed school start time
- What this could lead to
- If successful, this could provide evidence for schools to adopt later start times to help teens sleep better and feel healthier.
- What could go wrong
- This is a completed observational study, not a treatment trial. Results may not apply to all schools or countries, and benefits might be small or inconsistent.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
University of Bergen
Bergen, Vestland, 5019, Norway
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