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Experts explain how much sleep the average adult needs and how to make sleep a priority. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to ...
Some adults need nine or 10 hours of sleep every night to feel rested, says Harris, whereas others may find they only need seven, and sleeping more isn’t necessarily better.
The sleep cycle of alternate NREM and REM sleep takes an average of 90 minutes, ... 8 to 10 hours Adults (18–64 years) 7 to 9 hours Older Adults (65 years and over)
Adults (18-64 years) typically need 7-9 hours of sleep. Older adults (65+ years) might find their optimal range to be 7-8 hours.
Other researchers have questioned these claims. A 2004 editorial in the journal Sleep stated that, according to the available data, the average number of hours of sleep in a 24-hour period has not changed significantly in recent decades among adults. Furthermore, the editorial suggests that there is a range of normal sleep time required by ...
It is sometimes called the ultradian sleep cycle, sleep–dream cycle, or REM-NREM cycle, to distinguish it from the circadian alternation between sleep and wakefulness. In humans, this cycle takes 70 to 110 minutes (90 ± 20 minutes). [1] Within the sleep of adults and infants there are cyclic fluctuations between quiet and active sleep.
Healthy adults need to sleep at least seven hours a night on a regular basis for optimal health, according to the American Academy of Sleep Medicine. So for most people, eight hours is enough.
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%.