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What happens when we sleep, and why we need just the right amount

By A Mystery Man Writer

Why do adults need 7 to 9 hours of sleep each night and why do kids need more? Experts explain what happens while we sleep – and what doesn't when we cut sleep short.

What happens when we sleep, and why we need just the right amount

Pulmonary & Sleep Associates of South Jersey (@PSASouthJersey) / X

What happens when we sleep, and why we need just the right amount

Dr. Michael Grandner

What happens when we sleep, and why we need just the right amount

Pulmonary & Sleep Associates of South Jersey (@PSASouthJersey) / X

What happens when we sleep, and why we need just the right amount

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What happens when we sleep, and why we need just the right amount

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What happens when we sleep, and why we need just the right amount

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What happens when we sleep, and why we need just the right amount

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What happens when we sleep, and why we need just the right amount

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What happens when we sleep, and why we need just the right amount

Samitivej Hospital in Bangkok, Thailand

What happens when we sleep, and why we need just the right amount

AHA News: What Happens When We Sleep, and Why We Need Just the Right Amount Each Night