Midnight (23: 00 ~ 1: 00) is the heaviest time of the day. At this time, rest can nourish yin, the sleep effect is the best, and the sleep quality is the best, which can play a multiplier role. This coincides with the theory that the human body needs to enter a deep sleep state before 23 o'clock. Childhood is also the time when the meridians of traditional Chinese medicine are implemented to the liver and gallbladder, and the time to nourish the liver should be the time to sleep. If you miss this time's sleep because you stay up late, your liver and gallbladder can't get enough rest, which can be manifested as rough face, dark spots and yellow face.
At noon (11:00 ~13: 00), take a nap at "Heyang" time and rest for about 30 minutes, at most1hour. Even if you can't sleep, you should "calm down" to balance your body, refresh your mind and replenish energy.
Why is it best for people to drink water before eating in the morning?
1. Replenish water: When sleeping at night, the human body consumes a lot of water from urine, face plate and breathing. After getting up in the morning, people will feel in a state of physiological water shortage. The human body loses about 450 ml of water in one night. Drinking water in the morning can replenish the water lost by body metabolism.
Second, prevent constipation: drinking water after getting up in the morning can also * * * gastrointestinal peristalsis, laxative, and prevent constipation.
Third, gastric lavage: after getting up in the morning, the stomach has been emptied. At this time, drinking water can clean and clean the stomach, dilute gastric acid, reduce the * * * of the stomach, and keep the stomach in the best condition.
Fourth, wake up: the water you drink after getting up will be quickly absorbed into the blood by the intestinal mucosa, which can effectively increase blood solubility, dilute blood, reduce blood consistency, promote blood circulation, prevent the occurrence of cardiovascular diseases, and make people's brains recover quickly from waking state.
Beauty beauty: Replenish water for the body after getting up in the morning, so that the water can be quickly transported to the whole body, which is helpful for blood circulation, and can also help the body expel toxins from the body, moisturize the skin and make the panel moist.
/kloc-When is the best time for people aged 0/3 to sleep? Before 10 at night, it is best to sleep 8- 10 hours every day.
Children in our country have insufficient sleep time and low quality.
China Youth Daily Beijing 65438+1October 20th (Reporter Fan, intern Jia Peng): "2. 1% of primary and secondary school students need drugs or health care products to fall asleep", which is the survey result in the topic "Living habits of urban children in China" just released today. The project was implemented nationwide from June 5 to February 2003. * * A survey was conducted among 26 17 children and 2573 adults in six cities including Changchun, Beijing, Shanghai, Guangzhou, Lanzhou and Chengdu.
The survey shows that although 90% of primary and middle school students think that sleep is very important, their sleep problems are very prominent in real life.
The first is a serious lack of sleep time.
This survey shows that 33.4% of primary school students sleep 10 hours or more every day, and 22.9% of junior high school students sleep 9 hours or more every day. The Ministry of Education clearly stipulates that the sleep time of middle school students should exceed 9 hours for primary school students, 9 hours for junior high school students and 8 hours for senior high school students. According to this regulation, about 2/3 of primary school students and 3/4 of junior high school students in China are seriously short of sleep time.
In addition to the lack of sleep time, the sleep quality of primary and secondary school students also has great problems. According to this survey, 23.5% of primary and middle school students have difficulty falling asleep at night, 64.8% of them don't wake up naturally in the morning, but are awakened by alarm clocks, and 20% of them and 13.3% of middle school students dream "a lot" at night.
In addition, most primary and middle school students do not form good sleep habits because of the heavy schoolwork burden. This survey shows that 66.4% of primary school students and 77. 1% of middle school students have no habit of taking a nap. There are 2. 1% students who can't fall asleep naturally and need drugs or health products to fall asleep.
Professor Gao Yingjun of Beijing Normal University pointed out that sleep plays a key role in children's growth and development. Because the growth hormone secreted by the anterior pituitary gland is most closely related to the growth and development of the human body, and this hormone is mainly secreted at night, children can only grow tall and strong if they sleep well.
Due to lack of sleep and poor sleep quality, many students have problems such as trance and memory decline. This survey shows that 10.7% of primary school students and 34.5% of junior high school students answer "often" or "sometimes" to doze off while listening to lectures and doing homework; 35% of primary school students and 59% of junior high school students answered "often" or "sometimes" that they feel "physically tired".
So what is eroding children's sleep time? The survey found that excessive study pressure has become the "culprit" of depriving children of sleep: 49.5% of primary and secondary school students can't go to bed early because of "too much homework"; The second place is "homework is too slow", with a selection rate of 32.3%; The next reasons are "the school requires to come to school in advance" (24.4%), "off-campus study" (13.4%) and "tutorial" (6.7%).
It should be said that parents want their children to have a good sleep. This survey shows that most parents have a scientific concept of sleep, and about 95% parents agree that "regular work and rest are very important for health", "sleep can promote children's growth and development" and "adequate sleep and nutritional supplement are equally important for the body". However, in the face of "learning", parents' ideas have wavered, with 65,400.
(China Youth Daily, 0 1, 2005, 2 1)
Why is it best for women to get married before the age of 25? Never heard of such a statement.
It is ideal for women to have children between the ages of 24 and 29.
Get married, regardless of age.
It depends on your actual situation!
Why do people sleep at night? You'd better sleep? About one-third of a person's life is spent in sleep, which shows how important sleep is to everyone. In a sense, the quality of sleep determines the quality of life. But why should a person sleep? This problem has always been a problem that scientists want to solve thoroughly. Recently, according to the British "New Scientist" magazine, scientists have put forward the reasons for sleep.
This paper introduces several theories, from simple energy-saving theory to complex theory involving memory processing, and makes a comprehensive discussion on human sleep.
There are two completely different states of sleep: fast wave sleep and slow wave sleep. What are their functions?
Scientists have found that sleep can be divided into two completely different States: one is called rapid wave sleep, and some people call this sleep state rapid eye movement sleep. As the name implies, the eyes move rapidly and the brain is very active during sleep, during which people dream.
The other state is called slow-wave sleep, which is the deepening of the first state, and the sleeper enters a deeper unconscious state. Scientists have found that fast-wave sleep and slow-wave sleep have different functions, and the two States also appear alternately during sleep.
Scientists agree that sleep is to rest the brain and cerebellum. Animals need to sleep, and brainless plants don't sleep; Some organs of the human body, such as the liver, do not rest. This shows that sleep is a unique phenomenon in the whole brain, and at least slow-wave sleep can make the brain repair the damage caused by free radicals. Free radicals are by-products of metabolism, which can damage human cells. Other organs can repair this damage by giving up and replacing damaged cells, but the brain can't do this. Only people can go to sleep, especially slow-wave sleep, and human tissues can use this rare "leisure time" for "emergency repair" operation. So what's the function of fast wave sleep? Some researchers have suggested that this is the "preparation action" and "arrangement action" that the brain does before entering slow-wave sleep, and it is a supplement to slow-wave sleep. However, some researchers disagree with this view, and think that fast wave sleep may be related to early brain development, but scientists who hold this view have not found convincing evidence.
Researchers have found that human sleep suddenly changes at the age of 20.
Our work and rest are controlled by the biological clock. This cycle is generally 24 hours. But it also varies from person to person. People with short work and rest cycles belong to lark type, and they all have the habit of going to bed early and getting up early; The other is called "night owl type", which is very active at night.
Jump, get up late in the morning.
Professor Tyr Ronnaberg of the University of Munich in Germany and his colleagues studied the changes of work and rest time in different periods of a person's life. The researchers surveyed 25,000 subjects between the ages of 8 and 90. After asking about their schedules one by one, the researchers got some relevant information. Are teenagers sleepy in the morning because they go dancing in the ballroom at night, or because they want to go to the ballroom at night and "recharge their batteries" in the morning? Through the investigation, the researchers calculated the "average middle point" of their sleep, that is, the middle time between when they fell asleep and when they woke up.
The researchers compared these "intermediate points" with everyone's age and found that before the age of 20, children's sleep time will gradually extend. After the age of 20, this situation will suddenly change, and the time point will start to move forward again, that is, start to get up early. Professor Ronnaberg said that he was not sure whether this change was due to behavior or environmental factors. However, he believes that this sudden change in work and rest habits is related to human physiology. "For the first time, we found the time watershed at the end of adolescence."
He pointed out that this time change also shows that women develop earlier than men. According to the researchers' survey results, women's puberty generally ends at 19.5 years old, while men's end time will not come until 20.9 years old.
Scientists also found that too little sleep can lead to "sleep debt"
Scientists have found that the length of time that everyone needs to sleep depends on many factors, including age. For most adults, seven to eight hours a night is the best time to sleep. Of course, some people may sleep less, only five hours a night, while others may sleep longer, as much as 10 hours a day. If a person doesn't get enough sleep a few days ago, he or she will need more sleep time.
Too little sleep can lead to "sleep debt", just like overdraft in a bank. Eventually, your body will demand repayment of this debt. It seems that we can't adapt to sleeping less than we need. Even though we may be used to the daily work arrangement of reducing sleep, our functions such as judgment and reaction ability will be weakened.
When people reach old age, although they need as much sleep time as when they are young and middle-aged, their sleep will be more "shallow" and the time span will be smaller. In other words, there is less time to sleep at a time. Almost half of the elderly over 65 often face sleep problems, such as insomnia, and many elderly people often have short or no slow-wave sleep stages. This change is normal for the elderly, or it is a common health problem of the elderly, or it is caused by the treatment of these health problems.
Abnormal sleep may damage people's health, or cause confusion, depression and other emotions.
Sleep is closely related to health. If you don't sleep well, your body will be out of order. For example, problems such as stroke and asthma often occur at night or in the early morning, which may be caused by changes in hormones, heart rate and other sleep-related characteristics.
Almost all patients with mental disorders have sleep problems. For example, people with depression often wake up in the early morning and can't sleep anymore. Lack of sleep can also lead to seizures. If a healthy person is extremely short of sleep, it may lead to paranoia and hallucination stage of psychosis, and the interruption of sleep will lead to madness (excitement and hyperactivity) of manic-depressive patients.
People with other physical diseases, including Alzheimer's disease, stroke, cancer and head injury, often have sleep problems. These sleep problems occur when the brain regions and neurotransmitters that control sleep change, or when drugs that control other diseases are taken. Once sleep problems occur, it may damage people's health or cause confusion, depression and other emotions. Patients who can't sleep will pay more attention to their pain and may take more painkillers.
Nowadays, people generally have a habit of "wasting energy", which will make people extremely lack sleep.
Researchers point out that if you feel sleepy during the day, it means you don't get enough sleep. If you fall asleep after lying for 5 minutes, it may be a serious lack of sleep. Sometimes when awake, there will be a short-term sleepiness (especially the paroxysmal sleepiness of those who lose their normal sleep, which usually lasts only 1 to 10 seconds) or a short-term sleep phenomenon, which is another sign of sleep deprivation. Many times, people don't know that they have experienced a brief lethargy. Nowadays, people generally have a habit of "wasting energy", which will make people extremely lack sleep.
Many studies clearly show that lack of sleep is dangerous. Using driving simulator or hand-eye coordination, it is found that people who lack sleep perform as badly as or even worse than those who are drunk. Lack of sleep will also increase the harmful effects of alcohol on the body, so a tired person drinking will be more harmful than a well-rested person drinking.
Why do people sleep?
Sohu health channel
Obviously, sleep is necessary. But if you ask: Why do individuals have to sleep? If you don't sleep for several days in a row, what are the physical and mental consequences? Such a question has never been answered in psychology.
Right "Why do individuals have to sleep?" So far, there are three different explanations for a problem:
1. biological clock and daily rhythm
In 24 hours a day, individuals show periodic activities in birth; When to sleep, when to eat, when to work, and when to queue () almost all have a certain order, which is almost determined by personal physiological operation. Such a physiological function that determines the periodic life activities of individuals is called biological clock. The formation of biological clock is mainly determined by the change of 24 hours a day, except for personal living habits (for example, the biological clock of people who often work at night shift is different from that of ordinary people). For example, the temperature changes obviously in one day, and the body temperature changes obviously in one day. When the ambient temperature drops and the body temperature drops, individuals will have the need for sleep. The daily temperature variation law is the lowest from midnight to around 5 am, and the human body temperature is also the lowest during this time. Therefore, for the vast majority of people, in Rosty Yi, from eleven o'clock to six o'clock in the evening, it is sleep time. Therefore, the biological clock is also called the circadian rhythm.
For animal life, the daily rhythm is very dominant. Therefore, the migration of migratory birds or fish mostly moves in the same longitude range in the north-south direction on the earth to maintain its periodic physiological clock. The activities of human ancestors, like other animals, started at sunrise and ended at sunset. However, with the rapid development of modern transportation and the flight of jet planes, the distance between the two sides of the earth has become dawn to dusk; Flying from Taibei to new york just happens to be upside down in the morning and evening, which makes people encounter the problem that sleep is difficult to adapt. This phenomenon is called jet lag. The common symptoms of jet lag are: physical and mental fatigue, loss of appetite and temporary sleep disorder. The trouble degree of flight time difference varies with the flight direction; When flying towards the sun (westbound to Europe), the flight time difference is less troublesome; When flying against the sun (eastbound to America), the flight time difference is more troublesome. The sleep disorder caused by jet lag usually disappears within three days to one week, and the personal physiological clock is re-established in the new environment.
2. Repair theory and maintenance theory
Recovery theory and conservation theory are two theories to explain the necessity of sleep. According to the theory of recovery, sleep can restore energy and eliminate fatigue. Recovery theory refers to recovery, including both physical and psychological aspects. Physiologically speaking, if an individual stays awake, he can't fully rest, and neither the conduction of the nervous system nor the operation of muscle glands can complete metabolism in time. It is a truth that you need sleep and rest after physical exertion, just like you need to supplement your diet after nutrient consumption. Man's physical strength is like a reservoir. When the water in the reservoir is consumed to a certain extent, it is necessary to temporarily close the outlet or reduce the water output to increase the water storage capacity of the reservoir and maintain the long-term water supply function. The recovery of this physiological level mostly occurs in the deep sleep stage.
On the psychological level, sleep can help individuals complete their mental activities that are not over when they are awake. Experiments of learning psychology have long proved that people who sleep immediately after practice will have better memory after waking up. The reason is to fall asleep immediately after practice, so as to continue to complete the unfinished information processing work during sleep. According to this psychological recovery, most of them occur in the shallow sleep stage. Dreaming is a kind of psychological activity, and the situation of dreaming is often related to life during the day. Even problems that cannot be solved during the day may be answered in dreams, which can also be used as evidence that sleep has a restoring function. According to the research of psychologists, dreams only occur in the shallow sleep stage.
Maintenance theory is a supplement to repair theory. According to the maintenance theory, the reason why individuals need sleep is mainly to store energy, contain vitality, and avoid excessive fatigue and harm health. In other words, for maintaining the normal function of body and mind, sleep has the function of automatic adjustment.
3. Evolutionary theory
In addition to the above two theories, there is another complementary theory to explain the necessity of sleep, which is called evolution. According to the theory of evolution, except for individuals who have to sleep, all kinds of animals, including humans, show different types of sleep patterns, mainly because they have evolved for a long time in the process of survival. Humans sleep at night and have a fixed place because they lack the ability to walk at night; In order to ensure safety and avoid the invasion of wild animals, the adaptability of building houses first evolved in the nest. Cattle, sheep, camels and other animals sleep in stages because they live in the wild all the year round and have no fixed place. They must sleep and rest at any time and wake up at any time in order to escape at any time when attacked. There is no fixed point and time for these animals to eat and live, because they live on the grassland and have grass to eat at any time. In addition, some animals, such as frogs and snakes, can't go out for food in winter, but they lack the migratory ability like migratory birds, so they have evolved the ability to hibernate after long-term adaptation to the environment.
Sleep is necessary for individuals, such as long-term lack of sleep or deprivation of sleep time, what impact will it have on people's body and mind? Psychologists have done a lot of experimental research in the past, and the results obtained are quite consistent and quite unexpected. In the experiment of sleep deprivation (not allowed to sleep or staying awake voluntarily during sleep), the longest record is 200 hours (more than eight days). The results showed that the subjects were extremely tired and sleepy, and there was no obvious abnormality in their physical and mental functions. Even psychologists have found that the performance of subjects who stay awake for 1 1 day has not been greatly affected.
Why do people sleep? Sleep contributes to brain development.
Sleeping is a physiological reaction, a part of brain nerve activity, and the result of inhibition of nerve cells in cerebral cortex after continuous excitement. When inhibition is dominant in the cerebral cortex, people will sleep. In life, people have work and rest, and in neural activities, people have excitement and inhibition. Inhibition is to protect nerve cells and make them excited again. Yawning is the first signal to remind us of lack of sleep. If 18 hours don't fall asleep, people's reaction time will change from 0.25 seconds to 0.5 seconds, and continue to grow. Ordinary people will start to have paroxysmal drowsiness, anywhere, lasting about 2 to 20 seconds, and then you will find it necessary to reread what you have just read. Your eyelids are getting heavier and heavier. In 20 hours, you will start taking a nap. According to research, the reaction speed of normal people is basically the same as that of people with a blood alcohol content of 0.08-if you keep driving at this value, you will be detained in many countries. You will also forget many things, such as double-checking the spelling of your name, or setting the brakes when parking on a hillside. In the animal kingdom, sleep is as important as food, water and sex. Everyone from fruit flies to modern people is like this. But scientists can't know exactly what sleep does. Is it to refresh yourself? Not exactly. As we all know, muscles don't need sleep, they just need intermittent relaxation. Is it to keep a clear head? Close. A good sleep is good for the brain. However, scholars have not reached a consensus on how the brain benefits from sleep. One theory is that sleep helps the brain to store all the information that humans receive when they are awake. Another view is that sleep is to restore energy. It has also been suggested that sleep often uses some mysterious forms to help us master various skills. What is sleep? Two things happened in the mid-1990s, which brought the focus of research back to the real purpose of sleep. 1994, scientists from Weizmann Academy of Sciences in Israel suggested that scholars' research should focus on the problem of false memory processing, and the technology of peeping into the sleeping brain was greatly improved at that time. Scientists at Weizmann Academy of Sciences have found that the duration of people's rapid eye movement sleep is directly related to their ability to recognize fixed patterns on computer screens. This technique is called program memory, which requires repeated operation and practice. Memorizing facts, such as the name of the president of the United States, is declarative memory-an ability that has nothing to do with REM sleep. Robert, a neuroscientist at Harvard Medical School, said. Stickgold said: "Our understanding of memory is always naive." Unexpected discovery, but for a while, scientists suddenly made clear the direction of memory research. In the past few years, Stickgold and his colleague Matthew. Walker studied the effect of sleep on motor skill program memory at Beth Medical Center in Boston, USA. They asked right-handed trainees to type a string of numbers as quickly as possible with their left hands over and over again. They found that no matter what time of the day the experiment was conducted, the accuracy of the trainees would increase by 60%-70% after 6 minutes. However, if the students accept the experiment in the morning and re-test after 12 hours, the accuracy will not be greatly improved. However, when students train at night and take the test after getting up, the speed will increase by 15%-20% and the accuracy will increase by 30%-40%. To the surprise of experts, those trainees who made the greatest progress spent the most time on non-rapid eye movement sleep. Other training about vision or perception requires trainees to have deep sleep or both slow-wave sleep and rapid eye movement sleep. Sometimes, even closing your eyes for an hour can make a big difference. At other times, a good sleep is very necessary.
Eating and sleeping is a human instinct and a necessary condition for the continuation of human life. Our ancestors never pecked at the benefits of sleeping first. For example, sleeping for an hour is equivalent to eating a few pieces of meat to increase physical strength, and then going to sleep with all your energy. Obviously, modern people have made great progress in this respect. If scientists want to find out the benefits of sleeping, they just need to reduce to absurdity-find out the disadvantages of not sleeping. I once read a report that a scientist told a volunteer not to sleep for a month. As a result, the person kept hallucinating and his nerves almost collapsed. But then he only slept for nine hours and then returned to normal. Sleep can at least ensure that you don't collapse and even pull you back from the brink of collapse-this can be said to be the first benefit of sleep. It can make economists who are good at calculation feel better. Of course, an economist suffering from insomnia will fly into a rage, and doctors will generally advise him to use some sleeping pills. In real life, if you ask a person about the benefits of sleeping, he will open his mouth wide enough to swallow a dinosaur egg to show that this is a question he doesn't have to answer. Especially when asking this question in winter, I believe many people will close their eyes and have a happy smile on their faces, as if the surrounding air has become a transparent quilt, and the voices of people around them are like the whistling wind outside the window, accompanying his sweet dreams. Seeing his sweet face, people who don't know him think he is reliving his first love! Indeed, when you curl up in the quilt like a snail, there is no outside world, only this warm quilt and yourself. In other words, you don't have to face everything you don't want to face except the cold. Dreams are often like a magic mirror. If you want to be yourself, you can see yourself. What others need to spend a lot of energy or even a lifetime can't be achieved, but you can easily achieve it behind the scenes. Why not? Four or two thousand dollars, which is probably the second benefit of sleeping. But people who have nightmares are afraid to itch again. Well, who says this is an unfair world? In fact, there are many benefits of sleeping. For example, if you sleep until noon, don't you save a breakfast? Besides, don't you save two meals by sleeping at night? Furthermore, sleeping until the next day or the third day ... may create a Guinness World Record. Or simply hold a Guinness Sleep Contest, which is much more comfortable than making a pair of giant jeans or watching who kisses the longest-both the contestants and the audience are comfortable, and it can save a lot of manpower, material resources and financial resources. Therefore, taking a nap is not as good as sleeping. Napping can only save money, and sleeping can be famous. In addition, some people look for jobs from other people's dreams-isn't there someone who writes books for others? It is said that the best way for the dead to communicate with the living is to dream. Concealed dreams are easily accepted, which can stimulate people's imagination without the horror of meeting them. Where can I have a dream without sleeping? Since sleeping has so many benefits, the famous writer Deng Tuo wrote that it is ridiculous to cherish one third of life and ask people to sleep less and work more. Doesn't he know that only people who can rest can work? Now that scientists have determined that sleep will take up one-third of life, since everyone can't stay awake, and since sleep has so many benefits, why can't we take good care of our sleep? No wonder everyone says you can't blindly listen to celebrities.