People of different ages have different optimal sleep times, as follows:
1, newborn
Newborn children, that is, newborns, sleep about 20 hours a day, and babies sleep about 14 to 15 hours a day;
2. Teenagers and young people
Primary school students, that is, teenagers, take about eight hours to 12 hours, middle school students take about nine hours a day, and college students and adults basically take eight hours a day;
3, the elderly
Old people aged 60 and over sleep about 9 hours a day. If they sleep less at night, they can make up for it at noon.
According to scientists' research, people who sleep seven to eight hours a night live the longest. If adults sleep more than 10 hours every day, 80% may have short-term energy. Therefore, it is suggested that adults should not sleep more than 10 hour, but only 7 to 8 hours.
Extended data
The quality of sleep can be measured by five criteria:?
1, fall asleep quickly and fall asleep within 30 minutes.
2, deep sleep, not easy to wake up.
3, no night or little night, no dreams, and soon forget the dreams after waking up.
4, get up quickly, get up in the morning in good spirits.
5, clear-headed, energetic, efficient and not sleepy during the day.
According to the standards of the World Health Organization, when one or more of the following items exist at the same time, it can be judged as insomnia:
1, at least three days a week for a month, and I can't sleep for 30 minutes.
2. Sleep less than 6.5 hours a day.
3. It is difficult to fall asleep when you wake up more than 3 times at night during sleep.
4, many dreams, the plot of nightmares is like a TV series.
5. I woke up the next day with drowsiness, fatigue, poor mental state and cognitive decline.
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