Although variable: A recommendation for 7.5 to 8 hours of sleep for an adult is normal.
Answered 1/10/2014
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7-9 hours for adults: Our sleep needs vary with our age, genetics and activity level, but most adults need 7-9 hours of sleep each night. For more details see http://www.Sleepfoundation.Org/article/how-sleep-works/how-much-sleep-do-we-really-need.
Answered 1/10/2014
4.6k views
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