Generally speaking, people of different ages have different optimal sleep time. Newborns need to sleep more than 20 hours a day, infants need to sleep 14 hours to 15 hours, preschool children need to sleep 12 hours, primary school students need to sleep 10 hours, middle school students need to sleep for 9 hours, college students only need to sleep for 8 hours, and adults need to sleep. It is not good to sleep too long or too short, so pay attention to the best sleep time.

Extended data

Lack of sleep can lead to many diseases.

Modern people often have the problem of lack of sleep because of work pressure or other factors, which will cause extremely serious harm to the body in the long run:

1, grumpy: When people concentrate on doing something, if they are interrupted by unexpected interference, they will have negative emotions; If you don't get enough sleep, this negative emotion will be amplified.

2. Decline in learning ability: Short-term memory is an important key to determine the learning effect. People who don't get enough sleep, their short-term memory ability will be weakened, which will also affect the learning effect.

3, weight gain: people who lack sleep, hormones in the body will be unbalanced, not only increase appetite, but also want to eat high-calorie food, while the ability to control impulsive behavior will also decrease, these factors are superimposed, leading to rapid weight gain.

4, slow response: lack of sleep will also make people slow to respond to external things.

People's Daily Online-Only today did I know that sleeping time is not the healthiest for 8 hours!

People's Network-World Sleep Day: Three Things You Need to Know about Sleep