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1 in 300 thrives on very-early-to-bed, very-early-to-rise routine | Science Daily

1 in 300 thrives on very-early-to-bed, very-early-to-rise routine | Science Daily

A quirk of the body clock that lures some people to sleep at 8 p.m., enabling them to greet the new day as early as 4 a.m., may be significantly more common than previously believed.

So-called advanced sleep phase — previously believed to be very rare — may affect at least one in 300 adults, according to a study led by UC San Francisco and publishing in the journal SLEEP on Aug. 6, 2019.

Advanced sleep phase means that the body’s clock, or circadian rhythm, operates on a schedule hours earlier than most people’s, with a premature release of the sleep hormone melatonin and shift in body temperature. The condition is distinct from the early rising that develops with normal aging, as well as the waking in the wee hours experienced by people with depression.

Source: 1 in 300 thrives on very-early-to-bed, very-early-to-rise routine | Science Daily

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