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No, four hours of sleep is not enough for the average person. The minimum amount of sleep recommended for adults by the American Academy of Sleep Medicine is seven hours.
What's the recommended amount of sleep? ... The recommended sleep needs for each age group (per 24 hours), according to the American Academy of Sleep Medicine and CDC, is:
The recommended amount of sleep depends on a person's age, and individual sleep needs can vary based on medical, lifestyle and environmental factors.
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.
The whole period normally proceeds in the order: N1 → N2 → N3 → N2 → REM. REM sleep occurs as a person returns to stage 2 or 1 from a deep sleep. [20] There is a greater amount of deep sleep (stage N3) earlier in the night, while the proportion of REM sleep increases in the two cycles just before natural awakening. [17]
Polyphasic sleep is the practice of sleeping during multiple periods over the course of 24 hours, in contrast to monophasic sleep, which is one period of sleep within 24 hours. Biphasic (or diphasic , bifurcated , or bimodal ) sleep refers to two periods, while polyphasic usually means more than two. [ 1 ]
Experts discuss how much sleep people need, the health consequences of sleep deprivation, and how to sleep more. Is 7 hours of sleep a night enough? Sleep doctors weigh in
English: Chart showing CDC recommendations for amount of sleep needed, by age Data source: How Much Sleep Do I Need?. CDC.gov. Centers for Disease Control and Prevention (CDC). Archived from the original on 2 November 2023. "Last Reviewed: September 14, 2022.