Infants sleep most of the day (about 16 hours); teenagers usually need about 9 hours a day; and adults need an average of 7 to 8 hours a day. Although elderly adults require about as much sleep as young adults, they usually sleep for shorter periods and spend less time in deep stages of sleep. About 50% of adults over the age of 65 have some type of sleep disorder, although it is not clear whether this is a normal part of aging or a result of medications that older people commonly use.
Living with a sleep disorder can feel like you are fighting a losing battle. Research continues to shed new light on the process of sleep, helping doctors to know how sleep disorders affect the human body.learn more >
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