Sleep changes drastically across the lifespan. Babies take frequent naps and may sleep as much as 17 hours a day. The need for daytime sleep persists through toddlerhood, and elementary-aged children require 10-12 hours of sleep per night. While recommendations for adults have changed over the years, the most recent research suggests that adults should aim for 7-9 hours of sleep per night. Older adults need the same amount of sleep as their younger counterparts but may find it difficult to achieve due to physiological changes.

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