The elderly sleep too long is not good for their health. As we all know, people who sleep too little will get sick, but many people don't know that it's also bad to sleep too much. Researchers in the United States have found that women over the age of 50 have an increased risk of stroke by sleeping nine hours a day, according to a recent report. The reporter also learned in the interview yesterday that if you sleep too much, it will not only eliminate fatigue, but also affect your health and intelligence. In the sleep time, the sleep time with the lowest mortality is about 7 hours.
Risk 1:
Stroke and diabetes
After a seven-and-a-half-year survey of more than 90000 women aged 50-79, researchers in the United States found that people who sleep more than 9 hours a day have a 70% increased risk of stroke compared with those who sleep 7 hours a day. Sleep time is an independent factor that increases the risk of stroke. Nanjing Brain Hospital experts, the blood viscosity of the elderly is relatively high, if sleep time is too long, it will lead to increased blood viscosity, and increased blood viscosity is easy to induce stroke and other cerebrovascular diseases.
According to experts, another study shows that people who sleep too long may also induce diabetes. The survey found that people who sleep 7-8 hours a day are the healthiest. If you sleep less than 6 hours, the risk of diabetes increases about 2 times; if you sleep more than 8 hours, the risk of diabetes increases more than 3 times.
A survey shows that sleeping less than six hours a day can damage a person's health. At the same time, sleeping more than 9 hours is also harmful to health. In the survey of sleep time, the sleep time with the lowest mortality was about 7 hours. People who sleep less than 4 hours a day or more than 10 hours a day, whether male or female, have a high mortality rate.
Risk 2:
Respiratory, heart and digestive diseases
Xiao Li is a teacher in a school. He likes to sleep in. He often sleeps for more than 10 hours in the summer vacation. He found that his health is still relatively poor, often easily catch a cold. The doctor helped him to analyze that he often caught cold, which may have something to do with his like to sleep in.
Shi Suofang, chief physician of respiratory department of Jiangsu Provincial Hospital of traditional Chinese medicine, said that the air in the bedroom is the dirtiest in the morning. Even if the windows are covered, part of the air is not circulated. The unclean air contains a lot of bacteria, viruses, carbon dioxide and dust, which has an impact on the disease resistance of respiratory tract. For those who sleep too long for a long time, they usually have less exercise. Coupled with the dirty air in the bedroom, they are prone to cold, cough and other symptoms.
When people are active, their heart beats faster, their myocardial contractility strengthens and their cardiac output increases. When people rest, their heart is at rest, and their heartbeat, contractility and blood output decrease. If you sleep too much, it will destroy the law of rest and movement of the heart, the heart will rest again and again, and eventually make the heart contractile fatigue, a little activity will lead to heart beat, panic and fatigue. In addition, if you sleep too much, you will not be able to eat on time, gastrointestinal hunger peristalsis occurs, disrupting the law of gastric secretion, affecting digestive function.
Risk 3:
The lazier you sleep, the lower your intelligence
"Why is he still listless during the day when he sleeps 10 hours a night?" Xiao Chen, who works in a company, can't figure it out. In the past, he often complained that he slept too little, which made him dizzy. But every day increased sleep time, or no spirit, slow reaction to work, was scolded many times by the boss.
Experts explain that most people will think that to eliminate fatigue, we should sleep more. In fact, the idea of increasing sleep time to get healthy is totally wrong. People who sleep too long will become lazy and weak, and even their intelligence will decline. After a night's rest, muscles and joints will become relaxed. Immediately after waking up, activities can increase muscle tension, increase blood supply to muscles, and make bones and muscle tissues in a state of repair. At the same time, metabolic products accumulated in muscles at night will be eliminated, which is conducive to the recovery of muscle movement. People who often sleep in, because of muscle tissue missed the opportunity to get up, will feel soft legs, lumbosacral discomfort, weakness. The sleep center of a person who sleeps late is in an excited state for a long time, while the function of other nerve centers will become relatively slow due to too long inhibition time, so they will feel drowsy, listless, and even mental decline all day long.
The healthy sleep time is 6-8 hours
So, how long does it take to sleep every day to be healthy? Experts believe that for adults, 6-8 hours is the standard sleep time, the elderly can reduce 1-2 hours on this standard, and teenagers can increase 1-2 hours. For infants, it takes longer to sleep.
Of course, sleep time how much the most healthy, also need to be determined according to their own situation. The standard of judging one's healthy sleep time should be that one will not feel tired and energetic the next day.