Although the harm of too little sleep is well known, according to a new study, too much sleep may also be harmful. \x0d\\x0d\ Researchers at the University of California, San Diego found that people who sleep for 9- 10 hours every working day seem to have more problems in falling asleep and sleeping quality, as well as other sleep disorders, compared with people who sleep for eight hours every day. \ x0d \ x0d \ Sleep disorders include waking up in the middle of the night, waking up in the morning, unable to fall asleep again after waking up, fatigue during daily activities, etc. \x0d\\x0d\ In addition, people who sleep only seven hours a night also say that it is more difficult for them to fall asleep than people who sleep eight hours a day, and they feel less energetic when they wake up in the morning. \x0d\\x0d\ The results of this study published in the journal Psychosomatic Medicine show that people who want to get a good sleep may not have to set their sleep goal at more than eight hours. \x0d\\x0d\ DanielKripke, the author of the research report, said that it might be a good idea for people who sleep more than eight hours or eight and a half hours every night to consider reducing their sleep time. But he also cautiously said that more research is needed to prove this point. Previous studies have shown that long-term lack of sleep is potentially harmful. For example, a report shows that if a person habitually sleeps less than seven hours a night, the risk of death in a certain period of time is higher than that of people who sleep more. \x0d\\x0d\ It can be seen that 6-8 hours of healthy sleep every day is the best! \x0d\\x0d\ Recently, foreign medical research found that many people who often feel tired are not sick or lack of sleep, but are caused by too much sleep! Why does excessive sleep affect mental and physical strength? Because the blood circulation slows down during sleep, the nutrition and oxygen supply of the brain are greatly reduced. Sleep for too long, brain cells can't get enough oxygen and nutrition, so the activity ability is weakened. Too much sleep will reduce the activity of muscles and tendons, and muscles will get less oxygen and nutrition from the blood, so they will become relaxed and naturally feel tired. \x0d\ Many people who sleep too much and feel tired can speed up their sleep, deepen their sleep and eliminate fatigue and powerlessness if they reduce their sleep time and take proper physical exercise. \ x0d \ x0d \ so sleeping more is not a good thing. \x0d\\x0d\ According to the body's biological clock, it is beneficial to sleep around 1 1 o'clock at night, because brain activity and metabolism need adequate rest most between 10 and 2 o'clock. \x0d\\x0d\ Too long sleep, like lack of sleep, will lead to mental fatigue, physical fatigue and decreased metabolic rate. Sleep should not be too long. If you sleep too long, your heart will slow down, your metabolic rate will drop to a very low level, and your muscle tissue will relax. Over time, people will become lazy, cowardly and even mentally weak. So people should not sleep too long, 7-8 hours of day and night is enough for adults. If you want to gain health by increasing sleep time, it will be counterproductive, increase diseases and shorten life expectancy. \x0d\\x0d\ Newborn 20-22 hours February baby 18-20 hours 1 5 hours 2 years old 14 hours 3-4 years old 13 hours 5-7 years old/kloc- 60-70 years old, 9 hours, 70-90 years old, 10 hour, over 90 years old, should not be less than 10 hour \ x0d \ x0d \ Generally, a normal sleep of 6-8 hours a day is enough. If you miss your sleep because of work or other things, you can make up for it according to the amount of delay. Generally, the total compensation does not exceed two hours. Do some ordinary activities after getting up, and you will be full of energy and everything will return to normal. Too much compensation is not only useless, but also makes you more confused and even makes you dizzy, which is similar to the situation described in your question. This is because long-term brain relaxation and organ inhibition have a negative impact on the body's blood circulation and organs, resulting in hypoxia or malnutrition. \ x0d \ x0d \ In short, sleep time varies from person to person, so it is impossible to set an absolute time. Usually we say that everyone needs to sleep 8 hours a day to keep healthy, which is just an average. However, the proportion of ordinary people is still very large. The daily sleep time of ordinary people can refer to the basic sleep time value of about 8 hours. \ x0d \ x0d \ I hope my answer can help you, and I hope you have a healthy sleep!