結果 : what is normal time to sleep

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2:55

How much sleep do you really need? | Sleeping with Science, a TED series

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6 tips for better sleep | Sleeping with Science, a TED series

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The brain benefits of deep sleep -- and how to get more of it | Dan Gartenberg

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What happens when we sleep?

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Mayo Clinic Minute: What are the stages of sleep?

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Strengthen your sleep drive by spending less time in bed

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Mastering the Art of Sleep: Finding the Perfect Balance of Deep, Light, and REM Sleep

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13:24

My Evidence-Based Sleep Routine

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Best and Worst Times to Sleep

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Why 4 Hours Of Sleep Is Terrible For You — Even If You Don't Feel Tired

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Why some people can thrive on less sleep – BBC REEL

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How Sleep Affects Your Brain

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How much will my newborn sleep? - Boys Town Pediatrics

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Science Explains How Much Sleep You Need Depending on Your Age

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Sleep Hygiene: Train Your Brain to Fall Asleep and Sleep Better

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