In addition, a psychological study shows that there are genetic differences that cause some people to sleep less, some people need to sleep more, while some people are active at night and some people have to go to bed early.
The book Sleeping Face also mentioned that people's sleep cycle is about 1.5 hours, and usually they need to sleep for four or five complete cycles a night. When you wake up after a complete cycle, you will be more refreshed than when you are interrupted by sleep during the cycle.
In other words, when you measure sleep by sleep cycle, you can see how many cycles you sleep in one night. If there are about 30 cycles a week, it is appropriate, otherwise there are fewer sleep cycles, and in the long run, there may be symptoms of insufficient sleep.
Secondly, many people will struggle. What should I do if I only sleep for 5 hours today, and what should I do if I have been sleeping for less than 6 hours? Actually, you don't have to worry. Sleep is not just a day. If you sleep less today, you can make up for it by sleeping normally tomorrow. And even if you sleep less for a long time, as long as you feel energetic and sleep well, there is no big problem.
The key is that many people sleep a lot, but the quality of sleep is poor, which leads to lack of energy and embarrassment. If you want a better mental state, you should not let yourself sleep more, but try to improve the quality of sleep.