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The effects of chronotype, sleep schedule and light/dark pattern exposures on circadian phase
How body clock type, sleep habits, and light exposure relate to daily rhythm timing
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Abstract
Salivary dim light melatonin onset (DLMO) was significantly delayed after the delaying light intervention and significantly advanced after the advancing light intervention in both chronotype groups.
- Participants included 23 individuals, with 11 identified as late chronotypes and 12 as early chronotypes.
- Both early and late chronotypes exhibited similar responses to light interventions despite their differing sleep/wake timing.
- DLMO timing changes were consistent with previously published phase response curves for both chronotype groups.
- Controlled light exposure patterns influenced circadian phase changes effectively, advancing or delaying DLMO as predicted.
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