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interesting facts about sleeping
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Interesting Facts About Sleeping

• Optimal amount in humans
- Adult
The optimal amount of sleep is not a meaningful concept unless the timing of that sleep is seen in relation to an individual's circadian rhythms. A person's major sleep episode is relatively inefficient and inadequate when it occurs at the "wrong" time of day; one should be asleep at least six hours before the lowest body temperature. The timing is correct when the following two circadian markers occur after the middle of the sleep episode and before awakening:
+ maximum concentration of the hormone melatonin, and

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