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Is it normal for a 100 year old to sleep a lot?

According to the National Institute on Aging, older adults still need 7 to 9 hours of sleep per night, though their sleep patterns often change. Understanding what constitutes a normal adjustment versus a potential health issue is vital when asking, 'Is it normal for a 100 year old to sleep a lot?'. This guide explores the complex relationship between extreme longevity and rest.