Personal sleep patterns may matter more than 8 hours
A yearlong wearable study found that individualized short-sleep limits better reflected next-day well-being and heart-related measures.
How far sleep falls below a person’s own norm may matter more than whether it misses a universal target. Researchers followed 462 adults for a full year with Oura Rings. Participants regularly described how awake, driven, tense and emotionally well they felt. The team also assessed blood pressure, artery stiffness and other cardiometabolic indicators.
Each participant received an individualized cutoff. Researchers identified the 75th percentile of that person’s nights, then lowered it by one hour. Sleep beneath that mark was classified as short for the individual. This approach corresponded more closely with next-day functioning and the longer-range health measurements than the standard threshold of fewer than 6 hours.
Brief nights generally appeared alone instead of forming repeated runs. Weekends often broke those sequences, although Sunday had the highest likelihood of short sleep and Saturday the highest likelihood of longer sleep. Extra rest afterward reached a ceiling and did not entirely balance earlier losses. The findings indicate that steady sleep patterns may be more effective than relying on later catch-up rest.
- The research included 462 adults wearing Oura Rings.
- Personal cutoffs used the 75th percentile minus one hour.
- Saturday most often brought longer sleep; Sunday most often brought shorter sleep.
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