Why Do We Need Sleep? - Sleep Foundation
https://www.sleepfoundation.org/how-sleep-works/why-do-we-need-sleep
WEBDec 8, 2023 · Sleep is essential for physical and mental well-being, with various functions that contribute to overall health. The sleep cycle, including REM and non-REM stages, repeats several times throughout the night. Adequate sleep duration varies by age, but adults generally need at least 7 hours per night.
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