Chronotherapy Trial Tests Sleep Timing in Adolescents - Summary - MDSpire
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Chronotherapy Trial Tests Sleep Timing in Adolescents

Two-week chronotherapy trial evaluates circadian phase, sleep duration, and alignment outcomes.

  • By

  • Kathryn Wighton

  • May 13, 2026

  • 6 min

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A randomized clinical trial indicated that a 2-week personalized sleep program using bright-light and blue light–blocking glasses can help adolescents aged 16-19 with late sleep patterns achieve earlier circadian timing and longer weeknight sleep duration. Participants wore bright-light glasses upon waking and blue light-blocking glasses before bed, resulting in a 45-minute relative advancement in dim-light melatonin onset and a 47-minute increase in weeknight sleep duration. Despite showing positive results, the study highlighted limitations such as a lack of long-term follow-up and generalizability concerns due to the predominantly non-Hispanic sample.

Original Source(s)

Chronotherapy Trial Tests Sleep Timing in Adolescents

  • by Kathryn Wighton

  • May 13, 2026

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