1, newborn: a newborn child, that is, a newborn, sleeps for about 20 hours every day. For the baby, a day is about 14 to 15 hours;

2. Teenagers and young adults: primary school students are teenagers, about eight hours to 12 hours, middle school students are about nine hours a day, and college students and adults are basically eight hours a day;

3. Older people: Older people aged 60 and over will sleep for about nine hours every day. If the elderly sleep less at night, they can make up for it at noon.

Extended data

Basic rules of normal sleep

Normal adults enter non-REM sleep in the early stage of sleep, and turn to REM sleep after about 60 ~ 90 minutes. Rapid eye movement sleep lasts only about 65,438+00 ~ 65,438+05 minutes, and then it turns to non-rapid eye movement sleep. In this way, non-rapid eye movement sleep and rapid eye movement sleep appear alternately periodically, 4 ~ 6 times a night.

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