How many hours of sleep is good How many hours of sleep is good each day?

Generally speaking, the best sleep time for people of different ages is different, newborns need to sleep 20 hours a day, babies sleep 14 hours to 15 hours, preschool children sleep 12 hours a day, primary school students need to sleep 10 hours, middle school students need to sleep 9 hours, college students only need to sleep 8 hours, adults need to sleep 8 hours, and the elderly need to sleep 6 to 7 hours a day. Sleeping too long or too little is bad, so you should pay attention to the best time to sleep.

The normal sleep time of adults should be controlled at about 7 to 8 hours of effective sleep, and sufficient sleep quality can effectively relieve fatigue, but sleep time cannot be used to make up for the lack of sleep quality. Some people with biological clock disorders will also have certain differences in sleep time, because sleep is the synergy of various systems of the human body, when the biological clock is disordered, the various systems can not cooperate well, usually do not achieve the effect of deep sleep, often for a long time sleep can not get a good rest.

The reason for getting enough sleep for 7 to 8 hours is that all systems in the body are running regularly, and some physiological functions can only function better during sleep, such as the excitement of the vagus nerve, the production and release of growth hormone, etc. Excessive sleep will affect other physiological functions, so 7 to 8 hours is the best time to sleep.

If the sleep time is sufficient and regular, but the effect of relieving fatigue is still not achieved, you should see a doctor in time to rule out other causes.

From a health point of view, sleeping for four hours is not necessarily good for the body, it varies from person to person, the length of sleep of people, this is based on science, so for most people, sleeping for four hours is harmful to physical health, and the wisdom of the hour was certainly not perfect last year.

First, everyone's sleep time is different, some people sleep for a long time, some people sleep for a short time, as long as they wake up the next day is not dizzy, not there is nothing uncomfortable, as long as you feel that you have a special energy after getting up, you will say that you have slept well, whether it is four hours or six hours or eight hours, as long as you get up the next morning to be particularly energetic, it means that you have slept well.

Second, sleep is based on science, and it is generally accepted that the sleep time is generally eight hours, yes, this time has a certain scientific truth, not which person has the final say, so everyone is also recognized, if friendship Some people sleep for four hours are particularly spiritual, then he may have adapted to this time, but the most people are not necessarily suitable.

Third, sleep is also different, some people sleep and fall asleep soon after lying down, and some people may not be able to enter the sleep state after lying down for an hour, so the quality of sleep is not the same, some people are deep, it is also different, some people lie down and quickly enter the sleep state, and soon enter the deep sleep people, as long as they enter the deep sleep to have a good rest Deep sleep, good, sleep quality.

Fourth, sleep, four hours or six hours, or eight hours, this varies from person to person, this is not a unified standard, but most of the cognition is eight hours, as long as you have a deep sleep, you have rested, but your sleep quality is not good, you can't beat your sleep quality, it will be harmful to the body.

In short, four hours of sleep, or six hours, or eight hours? As long as you are used to it, as long as you wake up the next day, you are energetic and can go to work normally, it means that your sleep quality is already very good.

The sleep time is 18-20 hours in infancy, 10 hours in elementary school, 8-9 hours in middle school, and 6-8 hours in adulthood.

It is generally recommended that 8 hours is better. However, in general, the sleep time will be reduced after old age, and some elderly people can sleep for 5-6 hours.

There is another criterion for judging whether the sleep time is enough, which is to see whether the mental state of the next day is good. If it does not affect your study and work, your mood is relatively happy, even if you sleep less than 6-8 hours, it is still normal.

The time for sleep is there, and the stages of sleep are also more important. For normal young people, it should be best to sleep between 10 o'clock in the evening and 6 o'clock in the morning, if you stay up late, it will not only affect the detoxification of the body, lead to aging, pigmentation precipitation, and it is easy to reduce the body's immunity in the long run.

Sleep is one of the things that people must do every day, and only sufficient and high-quality sleep can make the body full of vitality and allow us to complete normal work and life.

High-quality sleep is about 8 hours, because everyone's genes and physical conditions are different, so the need for sleep is also quite different, for example, some people are very sleepy, and may sleep 9 hours or even 10 hours a day.

And some people do not have such a high demand for sleep, and 6 hours of sleep a day can meet their normal sleep needs.

Some people think that since sleep can bring a lot of benefits to the body, then sleeping more every day may be more helpful to maintain good health, is it better to sleep longer?

6-10 hours of sleep a day is appropriate, and the exact time needs to vary from person to person.

Sleep is an indispensable physiological phenomenon of the human body, about 1 3 times in a person's life in the state of sleep, sleep quality and human health have a close relationship. Adequate and high-quality sleep helps to restore mental and physical strength, can relieve visual fatigue, prevent the occurrence of vision loss, and also help to enhance the body's immunity.

Because each person's sleeping habits and sleeping environment are different, there are individual differences in the amount of sleep time per day, and the daily sleep time of minors is usually controlled at about 8 to 10 hours; Young and middle-aged people usually sleep 7 to 8 hours a day; The sleep time of the elderly will be relatively reduced, and the sleep time will also decrease, generally about 6 hours. Usually, if you wake up after sleep, if you feel comfortable, energetic, energetic, focused, etc., it means that the body and brain have been fully rested, then the sleep time is generally more appropriate.

From a health point of view, 4 hours of sleep is really not good for health, if the conditions allow, you should increase the sleep time appropriately.

People over the age of age need to get between 7 hours of sleep per day.

People between the ages of 60 and need to get 7 hours of sleep a day, and comparatively speaking, women need to sleep longer and need to be guaranteed about 7 hours.

Young people between the ages of 29 need to get 8 hours of sleep a day.

People between the ages of 12 and 12 need to get 10 to 12 hours of sleep a day.

5. For infants and young children, 15 to 16 hours a day are guaranteed, including about three hours during the day.

Dangers of hypersomnia:

1. Increase the probability of depression.

Some studies have found that prolonged sleep will increase the probability of depression, if you only sleep seven to nine hours a night, then the relative probability of depression is relatively low, once this time is exceeded, the probability of depression may be more than twice as high as that of seven to nine hours.

2. Harm the brain.

If you sleep too much, it will cause damage to the brain in the long run, leading to a decline in brain function, and relevant studies have also been conducted on this, and it has been found that the brain that sleeps beyond the normal range is two years older than the normal range.

3. Affect pregnancy.

Sleep time is guaranteed at 7 to 8 hours The probability of pregnancy is the highest, although it is not yet known what the causal relationship between the two is, it is speculated that it may be because sleep habits change the hormone secretion in the body, so it will affect the menstrual cycle.

4. Increase the risk of diabetes.

People who sleep more than eight hours a day are more likely to develop type 2 diabetes, or about twice as likely to have type 2 diabetes if they only sleep seven or eight hours a night.

5. Gain weight.

People who sleep too long every night are the same as people who sleep too little every night, and they are prone to obesity, even if they control people's diet and exercise, because the obesity caused by sleep is still 25% higher than normal sleep, so people who consider gaining weight can properly consider this factor.