(1) Minors:

1. Newborn. Newborns have not yet formed a relatively constant biological clock, so it is difficult to distinguish between day and night. The recommended daily sleep duration is: 1 week, newborns sleep every day 16- 17 hours; 1-4 months, sleeping 14- 16 hours every day. Newborns should not sleep less than 1 1 hour every day, otherwise their normal development will be affected.

2. Baby. Babies sleep longer than newborns. Generally, babies of 4- 12 months sleep 12- 16 hours a day. At this time, parents should help their children to take a regular nap, and sleep for no less than 10 hour every day, otherwise it will affect their normal development.

3. Young children and preschool children. At this stage, children are more active and sleep is more important for their growth. For children aged 1-2, it is suggested that the sleep time should be 12- 14 hours every day; 3-5 years old, the recommended sleep time every day is 1 1- 13 hours.

4. Primary school students. After children go to primary school, only when they get enough sleep can they ensure the activity and learning efficiency of the day. Therefore, it is suggested that children aged 6- 12 should sleep for 9- 12 hours a day, not less than 8 hours, otherwise the learning efficiency will be seriously affected.

5. Middle school students. At this stage, the child is still in the growth and development period, the study pressure is gradually increasing, and the sleep time is relatively reduced. 13- 18-year-old children should sleep for 8- 10 hours a day, less than 7 hours, which will lead to inattention, reduce exercise and seriously affect learning efficiency. ?

(2) Adults: 18-59 years old: 7-8 hours. 60-70 years: 5.5-7 hours

Extended data:

Precautions for sleeping:

1. Normal people sleep 6-8 hours.

2. The time for beauty sleep is from 22 o'clock to 2 o'clock in the morning.

3. Stay up late for a long time, even if you sleep for 8 hours, it will be prone to endocrine disorders and the biological clock will be disrupted after a few years.

Children had better go to bed before 20:30 in the evening, because they have grown up.

Teenagers should go to bed around 22 o'clock at night.

6. As for those who love beauty, they must go to bed before 2 am, because the skin is metabolized before 2 am.

7. Old people should sleep between 2/kloc-0 and 22: 00 at night. So people should not sleep too long, 7-8 hours of day and night is enough for adults. If you want to gain health by increasing sleep time, it will be counterproductive, increase diseases and shorten life expectancy.

Baidu encyclopedia-sleep time