Sleep is an important part of human life, and it has a profound impact on physical health and mental balance. With the development of society, people's understanding of sleep is becoming more and more profound.
We all know that sleep is very critical to human health, many elderly people say that they have sleep disorders, get up in the middle of the night and other problems, and Mr. Li said that these days are full of energy at night, stay up late to fall asleep.
Mr. Li said that it is necessary to develop the good habit of going to bed early and getting up early, but his friend Mr. Wang said that going to bed early and getting up early is not necessarily healthy, and the earlier you sleep, the sooner you die, so what is going on?
01
There is a saying that "the earlier you sleep, the sooner you die", is it true?
Most people think that going to bed early and getting up early is good, but I don't know when it started, there are rumors that "the earlier you sleep, the sooner you die", is this true?
This statement may come from a study published in foreign journals in 2021, which showed that both early and late sleep may increase the risk of cardiovascular and cerebrovascular diseases, and the risk of death is higher in early bedtime than in late bedtime.
The study is based on more than 110,000 people in more than 20 countries around the world, and after 9 years, it is reasonable to say that the scope and quantity of data is relatively credible.
But in the early sleep group data, more than half of the people are from underdeveloped countries such as Africa, and the medical level is already low, and it is a bit far-fetched and unreasonable to attribute the cause of their death to early sleeping.
Therefore, "the earlier you sleep, the sooner you die" is actually an untenable statement, but sleeping too long or not sleeping enough is not conducive to the health of the body.
02
How long do you sleep every day for longevity?
A team of researchers at the Japan Cancer Center, using Asians as a sample, investigated the impact of sleep duration on longevity, and screened more than 320,000 volunteers from South Korea, China, Singapore and Japan.
The volunteers were surveyed for nearly 14 years and divided into 6 groups according to sleep duration: less than 5 hours of sleep, 6 hours of sleep, 7 hours, 8 hours, 9 hours and more than 10 hours.
The final findings were published in JAMA Network Open, a sub-journal of the Journal of the American Medical Association. The study found that sleeping 7 hours a day was associated with the lowest risk of all-cause mortality, cardiovascular risk, and cancer.
Among the factors of all-cause mortality, men slept 6 hours and had the lowest risk of all-cause death, and women slept 7 hours with the lowest risk of all-cause mortality.
Sleep duration of more than 10 hours is associated with the highest risk of all-cause mortality compared to 7 hours of sleep in both men and women, and other sleep duration is associated with cardiovascular disease risk compared to 7 hours of sleep in men.
After comprehensively calculating a variety of risk factors, it is concluded that sleeping 7 hours a day is the most conducive to longevity, and sleeping too long or sleeping too little is not conducive to physical health.
Finally, after calculating a variety of risk factors, the study concluded that sleeping 7 hours a day is most beneficial to longevity. If you sleep too long or sleep too little, it is not good for your health.
03
Sleep too long or sleep too little, which is more harmful?
Sleep too long
Sleep time is too long, the sleep center long-term excitement other nerve centers, long time is inhibited, when rejuvenated, the response function will be relatively reduced, become dull, so after waking up will feel tired and weak, dizzy, no energy.
Moreover, the balance of neurotransmitters such as serotonin in the brain is disrupted, and headache symptoms will occur, in addition to which it will cause inflammation of the middle cerebral artery blood vessels and induce migraine.
Studies have found that older people who sleep more than 9 hours a day have a higher risk of Alzheimer's disease, and people who sleep more than 8 hours have a threefold increased risk of diabetes, so don't sleep too long a day.
Sleep too little
Long-term staying up late, lack of sleep will cause biological clock disorders, cause neurasthenia, lead to poor sleep quality, aggravate insomnia problems, and lead to decreased immunity.
Not getting enough sleep will increase the risk of depression, cancer, anxiety, metabolic diseases and other diseases, and long-term sleep deprivation is also one of the causative factors of high blood pressure.