Teens' sleep and light habits under the microscope

NCT ID NCT04921215

Completed Knowledge-focused Sponsor: Rush University Medical Center Source: ClinicalTrials.gov ↗

First seen Jun 26, 2026 · Last updated Jun 26, 2026

Summary

This study looked at how lack of sleep and evening light exposure affect the body clocks of teenagers aged 14 to 17. Researchers used morning bright light to try to shift teens' sleep schedules earlier. They measured changes in melatonin levels and sleep patterns to understand when the light stops working. The goal is to learn how to better help teens align their sleep with school schedules.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance: morning bright light from light boxes
What this could lead to: If successful, this could help design better light-based treatments to improve sleep and reduce health risks in teenagers.
What could go wrong: This is a small, early-stage observational study, not a treatment trial. Results may not apply to all teens or real-world settings.

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Conditions

The condition(s) this trial relates to.

circadian rhythm sleep disorder sleep disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

ADOLESCENCE CHRONOBIOLOGY CIRCADIAN RHYTHM LIGHT SLEEP

Contacts and locations

Locations

Rush University Medical Center, Biological Rhythms Research Laboratory

Chicago, Illinois, 60612, United States

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