Have you had enough sleep for 7 hours a day?
A study on more than 460,000 people in the Journal of the American Academy of Cardiology found this: people who sleep less than 6 hours or >9 hours have a higher risk of getting .
In early August this year, Sohu CEO O Zhang Chaoyang suggested sleeping less, sleeping for four hours a day is "perfect".
How long does it take for everyone to sleep is the most reasonable? Should you sleep for 7 hours or less? Now, based on my personal situation and what I have observed, let me talk about how long it takes to sleep to make sense.
sleep
When I was in junior high school, I lived in the school. Basically, I get up at 6 o'clock and go to bed at 11 o'clock in the evening. Even if I fall asleep immediately at 11 pm and just wake up at 6 pm, I only have 7 hours of sleep. Our school has an hour lunch break at noon. But I still fell asleep while the teacher was giving lectures during the day.
When I was in the second grade of junior high school, what impressed me the most was that one night at 8 o'clock, when our class was studying in the evening, the head teacher Feng walked in the teacher's corridor and gave a lecture. Maybe I was very sleepy at that time. When Teacher Feng was giving a lecture in the corridor on the left, I fell asleep to the right with my head tilted. After a few minutes, when Teacher Feng walked to the corridor on the right to give a lecture, he found that I was asleep. A slap woke me up. Afterwards, Teacher Feng punished me very severely: I was punished to stand for 10 minutes. Our class teacher, Mr. Feng, is a well-known teacher in the whole school and is known for his "strictness". It was because I fell asleep this time that Teacher Feng angrily canceled the qualification of the three good students in the area that I was about to report.
When I was in high school, I was also boarding in a "semi-military" high school. Get up at 5 o'clock every day and get off at 11 o'clock. The school regularly tests students' grades in of . It can be said that during the study and examination of wheel battles, I often feel sleepy. What should I do? I just go to a place with more faucets to wash my face more. For a time, I had to wash my face three times a day, which was not the same as the one I had when I woke up in the morning. Why do you need to wash your face? It is to wash away your sleepiness. Because I sleep less than 5 hours a day. Will this kind of learning be very efficient? Surely not.
I found that my efficiency was too low, and I was just scattering my life and time. When I decided to study, I gave myself more rest time: sit by the table and sit in a daze or sit in the playground for 1 hour. Or let go of yourself and think of nothing for an hour. It seems that the study time is 2 hours less every day, and I ask myself to "be careful about efficiency" (even if I know one question in 8 hours, it is more efficient than if I don't know one question a week.).
If you sleep for too long, such as waking up and staying in bed, it will disrupt the internal biological clock of the human body and cause the circadian rhythm of the brain to be delayed. What's more, the more a person often wants to sleep when he is sleeping.
If the sleep time is too short, such as less than 5 hours, it will also cause chaos in the human body's biological clock. After all, people are not iron-clad. More than 90% of people sleep too little, and their bodies cannot handle of .
In modern society, young people are under great pressure to work, so they should pay more attention to rest and ensure sufficient sleep time.
Friends, for your health and better work, please try to ensure 7 hours of sleep.
