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The sleep cycle of alternate NREM and REM sleep takes an average of 90 minutes, ... Hours of sleep recommended for each age group [93] Age and condition Sleep needs
Adolescent sleep worsens with age. Specifically, longitudinal research demonstrates that sleep duration shortens during the transition from high school to college. [6] Additionally, sleep efficiency (the amount of time spent asleep when in bed) decreased during this transition.
The amount of sleep needed can depend on sleep quality, age, pregnancy, and level of sleep deprivation. Sleep deprivation is linked to various adverse health outcomes, including cognitive impairments, mood disturbances, and increased risk for chronic conditions.
Researchers examined the sleep patterns and durations of 526 people, with an average age of 40 at baseline, who were followed for 11 years. Participants wore a wrist monitor for three consecutive ...
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Sleep efficiency (SE) is the ratio between the time a person spends asleep, and the total time dedicated to sleep (i.e. both sleeping and attempting to fall asleep or fall back asleep). It is given as a percentage. [1] SE of 80% or more is considered normal/healthy with most young healthy adults displaying SE above 90%.
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