Is 5 hours of sleep a day enough?

More and more people are beginning to pay attention to their sleep problems, because good sleep can ensure that the body does not get sick and is not overly tired. Normally, five hours of sleep a day is not enough. Not only will you feel very tired and the quality of your skin will become very poor, but it will also be difficult for the mind to rest well. If this continues for a long time, it will cause great physical and mental stress. In addition, fatigue can easily lead to problems with mental state, as well as internal organs of the body.

Normal sleep time

Sleep time refers to a natural physiological phenomenon of humans and animals, a natural and usually regular temporary suspension of consciousness, during which time the body's strength is restored, the body can rest with eyes closed, and the cerebral cortex is in a resting state.

The appropriate sleep time for different age groups:

Newborns: 20-22 hours

2-month-old baby: 18-20 hours

1 year old: 15 hours

2 years old: 14 hours

3-4 years old: 13 hours

5-7 years old: 12 hours

8-12 years old: 10 hours

13-18 years old: 9 hours

Adults: 7-8 hours

60-70 years old: 5.5-7 hours

The dangers of sleeping too long

Adults sleep 7-8 hours a day. Proper sleep can eliminate fatigue, but sleeping too long is harmful to health:

1. Weakness :

When people are active, their heart rate speeds up, myocardial contractility strengthens, and cardiac output increases. When resting, the heart is in a resting state, and the heart rate, contractility, and blood output decrease.

If you sleep for a long time, it will disrupt the rhythm of the heart's rest and movement, making the heart weak in contraction. The slightest movement will cause panic, fatigue and easy fatigue, thus forming a vicious cycle, leading to physical weakness and reducing the body's resistance. So, how long should people sleep a day and how should they sleep to be healthy?

"Our sleep is related to the secretion of melatonin and the core body temperature. Generally speaking, the human body temperature reaches its highest at 7 pm and then begins to drop. Melatonin begins to be secreted at 9 pm, and intestinal motility is inhibited at 10:30. In other words, the period from melatonin secretion to intestinal motility inhibition is the time to fall asleep. 2 to 4 in the morning is the deepest sleep, and this period is also the time when you are most likely to doze off." said.

He pointed out that generally speaking, people's normal sleep time is 7.5 hours, and the minimum is not less than 6.5 hours, but there are exceptions. As long as you feel you have had enough sleep and are energetic, it's fine. Moreover, as far as current research is concerned, drugs such as exogenous melatonin have little effect and are more of a psychological suggestion. Therefore, patients with sleep disorders should seek medical attention and take measures in time.

In addition, Pan Jiyang said that light has a great impact on sleep. The blue light emitted by screens of smartphones, tablets, etc. will inhibit the secretion of melatonin in the human body and disrupt sleep. In addition, the interestingness of browsing content makes it even more difficult for people to fall asleep. Therefore, playing with mobile phones, tablets, etc. before going to bed is not a good choice.

"Many people are used to taking a bath before going to bed to relieve fatigue. In fact, taking a bath may be a way to relax for people who sleep well. But taking a bath before going to bed will increase the body's temperature. For people with insomnia, taking a bath before going to bed may have the opposite effect." said.

He also suggested that people can take an appropriate nap at noon, but the recommended sleep time should not exceed half an hour. Especially for those who have poor sleep, it is best not to enter deep sleep at noon to avoid difficulty falling asleep at night.