New Concept of Sleep

By Wang Lifang. Good sleep is a sign of health. Human sleep time accounts for one-third of the course of life and is also an important physiological process for human survival. Human sleep can be divided into rapid eye movement sleep and non-rapid eye movement sleep. During rapid eye movement sleep, the limbs stop moving, but the brain remains active. The eyeballs move rapidly and dreams often occur. Non-rapid eye movement sleep is sleep that progresses from light to deep without rapid eye movement. The sleep of a political party is a repetitive cycle of these two states. During sleep, there may be changes in breathing, heart rate, blood pressure, muscle tone, basal metabolic rate, endocrine hormones, as well as various neuropeptides and mediators. Disorders of these functions can cause diseases in people. Therefore, sleep is also an important indicator for evaluating human health. Taking a nap - Recharging life German scientists have found that a person's fully awake state can only last for about four hours. Therefore, even during the day, there is a need to take a short nap, which is controlled by the body's biological clock. It usually appears around 9 a.m., 1 p.m. and 5 p.m. Some people have calculated that the time modern people sleep at night has decreased by about 20% compared to a century ago, thus causing serious "lack of sleep" and imbalance of the internal environment. If people do not get enough sleep, the fatigue caused by work and study will not be relieved and their energy will not be restored well. Therefore, taking a nap is a supplement to the lack of sleep at night and also a good way for the human body to quickly "recharge". If your eyelids are "drooping", the best approach is to simply close your eyes and take a nap, even if it's only for 15 to 20 minutes. When you wake up, you'll be full of energy and focus on completing a certain task. The tradition of taking a nap before meals is to rest after lunch, which makes many people feel dizzy, weak in limbs and listless all over after sleeping, thus having a negative impact on their work and study in the afternoon. What's the reason for this? It turns out that the blood in the human body has a relatively constant indicator. After a person eats, the blood flow will tilt towards the digestive system, resulting in a relatively reduced blood supply to the brain and limbs. In this way, the brain and limbs do not receive sufficient oxygen and nutrient supply, and metabolic products cannot be excreted in time, thus causing a series of malfunctions. Over time, it will induce various diseases. The new way to take a nap at noon should be to have some fruit or milk after work or school at noon, then take a half-hour nap and get up to have lunch. Studies show that taking a half-hour break before a meal is more effective in eliminating fatigue than sleeping for two hours after a meal, and it can significantly improve work and study efficiency in the afternoon. Going to bed early and getting up early does not necessarily mean good sleep. Sleep should be determined based on individual conditions and different seasons. Going to bed early and getting up early may not be suitable for everyone, nor is it necessarily the most beneficial to health. According to the sleep principles summarized in ancient medical books, one should go to bed late and get up early in spring and summer, go to bed early and get up early in autumn, and go to bed early and get up late in winter. Because spring and summer belong to Yang and the weather is relatively hot, going to bed early can easily make it difficult to fall asleep or sleep restlessly, while going to bed later makes it easier to fall asleep. Youdaoplaceholder0 In summer, the sunrise is early. This means getting up early and starting the day's activities before the scorching heat. Naturally, more time can be utilized. Autumn and winter are Yin seasons. Not only does the weather turn cooler, but it also gets dark very quickly. Going to bed early can prevent the cold at night from hitting you. The weather in autumn is cool and pleasant, which is the most suitable time for activities. Going to bed early and getting up early will increase the available time. If you get up too early in winter, you are likely to catch a cold. You should wait until the sun comes out and it is relatively warm before engaging in activities. Many people think that the air is freshest in the morning and getting up early must be good for health, so they force themselves to go to bed early and get up early. In fact, the concentration of carbon dioxide in the air is usually high in the early hours of the morning, and many waste gases still sink to the ground. If you get up and move around at this time, the air you breathe may not be fresh. Instead, it is healthier to follow a regular schedule that rises and sets with the sun. It is beneficial for the physical and mental health of the elderly to stay in bed for a while. Staying in bed for a while means not getting up in the morning and lying still in bed for another 5 to 10 minutes. The medical community believes that it is the "way of health preservation" for middle-aged and elderly people, which is beneficial to health and should be developed into a habit. Sleeping in helps keep the biological clock running. Medical research shows that the operation of the human body's biological clock is closely related to light. There is a difference between when people are active with their eyes open and when they sleep with their eyes closed. The biological clock is regulated by light, so a few minutes of lying in bed is an ideal alternating process, and lying in bed can reduce the occurrence of sudden illness. The early morning is the "devil's time" when cerebrovascular diseases are prone to occur, and the most dangerous moment is precisely the very first moment of waking up. When people are sleeping, the cerebral cortex is in an inhibited state, and various physiological functions maintain "low-speed movement". The body's metabolism decreases, the heart rate slows down, blood pressure drops, and some blood accumulates in the limbs. When you wake up in the morning, your breathing, heart rate, blood pressure, muscle tone and other functions quickly resume their "normal speed" at the moment when your brain shifts from inhibition to excitement, causing your heart rate to increase, blood vessels to constrict and your blood pressure to rise. So getting out of bed immediately after waking up is undoubtedly adding insult to injury for an already overburdened heart. It is most likely to trigger cardiovascular diseases and even cause unexpected death.