07/23/2014 01:16 pm ET Updated Jul 23, 2014

Why 7 Hours Of Sleep Might Be Better Than 8

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How much sleep do you really need?

Experts generally recommend seven to nine hours a night for healthy adults. Sleep scientists say new guidelines are needed to take into account an abundance of recent research in the field and to reflect that Americans are on average sleeping less than they did in the past.

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