Night Owls and Early Birds Aren’t Enough: Scientists Identify Five Distinct Sleep-Wake Profiles

Feb 3, 2026 - 16:30
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Night Owls and Early Birds Aren’t Enough: Scientists Identify Five Distinct Sleep-Wake Profiles
Weekend recovery sleep doesn’t prevent weight gain or reduce insulin sensitivity. Image credit: Wok & Apix.

New research led by McGill University scientists suggests human sleep patterns (chronotypes) fall along a broader biological spectrum -- with each subtype tied to unique health and behavioral traits -- challenging the simple ‘early bird/night owl’ divide.

The post Night Owls and Early Birds Aren’t Enough: Scientists Identify Five Distinct Sleep-Wake Profiles appeared first on Sci.News: Breaking Science News.

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