結果 : how much sleep is normal for adults
2:55

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The science of how much sleep you actually need

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Science Explains How Much Sleep You Need Depending on Your Age

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Putting to Rest Myths About Seniors & Sleep

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3:54

Do You Really Need 8 Hours of Sleep Every Night? | Body Stuff with Dr. Jen Gunter | TED

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Are naps actually good for us? | Sleeping with Science

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Why some people can thrive on less sleep – BBC REEL

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