結果 : how much sleep is enough for a 15 year old
2:55

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

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How many hours of sleep a night do I need?

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9:21

Science Explains How Much Sleep You Need Depending on Your Age

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How many hours of sleep do you need?

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2:01

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1:38

Sleep Time & Age

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3:33

How Much Sleep Do You Need? - Professor Of Neuroscience, Russel Foster

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Science Explains How Much Sleep You Need Depending on Your Age

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5:09

Yoga Guru - Hansaji | How many hours should you sleep?

The Yoga Institute
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1:01

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

WCNC
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1:58

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

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2:16

Ask Dr. Nandi: Do you really need less sleep as you age?

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Why Getting the 8th Hour of Sleep Matters

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What Happens to Your Body on Little Sleep?

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1:54

Best and Worst Times to Sleep

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0:35

Elon Musk Shares How Many Hours of Sleep He Needs to Be Productive! | @MindMasteryX

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6:25

Can You Sleep Too Much? (The Answer Might Surprise You)

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1:58

Why Do I Feel So Sleepy Despite Having Enough Sleep? – Dr. Berg

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1:39

How old is too old for your child to sleep in bed with you? Expert advice for parents

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1:51

I Can't Sleep for More Than 4 Hours a Night - Why? | This Morning

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