結果 : why don't i get very much deep sleep
6:38

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

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

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REM Sleep Disorder

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Insomnia: why can't I sleep?

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Relaxing Sound for Deep Sleep #DeepSleep #NatureSounds #SleepAid #RainSounds #SleepWell

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"Get Quality and Sufficiently Long Deep Sleep" by Dr. Andrew Huberman

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What Happens To Your Body And Brain If You Don't Get Sleep | The Human Body

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What happens when we sleep?

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What causes insomnia? - Dan Kwartler

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Are You Sleeping Too Much?

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5:00

The Danger of Sleeping Too Much

The Wall Street Journal
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How to Stop Waking Up in the Middle of the Night- 6 Ways to Beat Insomnia Without Medication

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Why you're still tired after getting 8 hours of sleep

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Doctor Explains Why You DON’T Need 8 Hours Sleep!

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Dr. Matt Walker: The Science & Practice of Perfecting Your Sleep

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