The study, which included more than 6,600 participants, found that participants who spent more time in bright light had more regular sleep, and that more regular sleep was associated with lower depression symptoms and lower odds of mild or severe depression. Getting consistent, regular sleep has wide-ranging effects on our health Future studies examining bright light therapy should not overlook the role sleep regularity may be playing in influencing mood and depression symptoms The team investigated whether bright light exposure (at a level generally equivalent to daylight exposure) was associated with depression symptoms, and, if so, whether the sleep-regularity index (a measure of the consistency of day-to-day sleep schedules) explained this association. Bright light and sleep regularity were measured using a wrist-worn device. greater time spent in bright light was modestly associated with lower depression symptoms and that sleep regularity partly explained this association Higher Vitamin D was also associated with greater bright-light exposure and greater sleep regularity, but not with depression symptoms
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Friday, September 13, 2024