Daily sun exposure improves sleep

　　Sunbathing has many benefits. It helps the body synthesize vitamin D, which in turn helps the body absorb calcium and phosphorus, and helps build strong bones and teeth. In addition, regular exposure to the sun can improve sleep and improve sleep quality. It is also a good medicine to prevent and treat insomnia without spending a penny.

　　How long do we need to sleep?

　　Do you often feel "empty" or drowsy during the day? Is it always hard to get out of bed on Monday morning? If so, you’re bound to conclude: “I don’t get enough sleep! ”

　　I believe we are all familiar with the harm caused by lack of sleep: low energy, slow reaction, memory loss, reduced immunity, and even premature aging of the body? ? The most common statement at present is that an adult should have 7 to 8 hours of sleep, but an experiment at the University of California in the United States came to a sensational conclusion: "Sleeping 8 hours a day will make you die faster." ”

　　The six-year experiment was led by the University of California, San Diego School of Pharmacy and the U.S. cancer Learn to work together. They observed one million subjects aged between 30 and 102 years old. In this experiment, the age, medical history, healthy Conditions, etc. are all taken into account, and they are compared with people who are physically similar to themselves.

　　Studies have found that people who sleep only 6 or 7 hours a day have a much lower mortality rate than people who sleep more than 8 hours a day or less than 4 hours a day. Among them, people who sleep for 7 hours a day have the lowest mortality rate, and even for people who only sleep for 5 hours, this coefficient is lower than that of people who sleep for 8 hours.

　　Although research institutions say that more evidence is needed to prove the causal relationship between mortality and sleep time, it undoubtedly gives us a new reminder: How long do we need to sleep?