Sleep is a very important thing in a day. Good sleep can ensure a full mental state and improve the efficiency of work and study. Therefore, many people have to stay up late on weekdays and choose to make up their sleep on weekends, often more than 9 hours. However, sleeping too much is actually harmful to your health.
What's the harm of sleeping too much?
1, stomach injury
Normal sleep time is generally six to eight hours a day. Sleeping too long will reduce the corresponding activity time and cause harm to the stomach. Because after a night of absorption, the stomach has digested the food, but at this time, gastric juice is still being secreted. If you don't eat breakfast, the gastric juice secreted will easily damage the gastric mucosa.
2, affect the heart function
Sleeping too long will not only affect the biological clock of the heart, but also lead to weak contraction of the heart; It will also increase the content of triglycerides in the blood and reduce benign cholesterol, thus increasing the risk of arteriosclerosis.
3. Insufficient blood supply to the brain
Too much sleep can easily weaken heart activity, lead to a decrease in cardiac ejection, cause insufficient blood supply to the brain, and lead to dull thinking and dizziness.
4. Memory loss
Long-term sleep will also reduce the activity of brain cells, make the sleep center in an excited state and inhibit other nerve centers. In the long run, it will affect the cognitive function of the brain and lead to memory decline.
5, easy to fatigue
Sleeping for too long will also make people more sleepy, thus slowing down the metabolism of the human body, failing to provide sufficient oxygen to muscle tissue, and easily causing physical fatigue, headache or discomfort.
How long is it appropriate to sleep a day?
Generally speaking, different people sleep at different times. It is appropriate to control the sleep time of adults between six and eight hours, and it is best not to be less than or more than this range, otherwise it will easily affect human health. In addition, the elderly can be protected for five or six hours, and teenagers can be protected for about eight to ten hours. However, it should be noted that in addition to proper sleep time, it is also important to ensure good sleep quality, so we should also improve sleep quality at ordinary times.