What are the advantages and disadvantages of sleeping in class? Great gods help me. Disadvantages: sleeping in class is easy to catch a cold in winter ... (that's what I do), and it's not as comfortable as sleeping in bed ~ Advantages: I can feel the class is almost over ... I don't listen to the teacher's nagging. ..
What are the disadvantages of turning on the light to sleep? The great gods helped me say that it is a waste of national resources and harmful to the health of the earth! Speak small, it's not good for your eyes, pay attention to maintenance! To sleep comfortably and steadily, we must create the necessary conditions and environment conducive to sleep; This includes no light interference, not enough to eat, neither cold nor hot indoors, and fresh air. Of these five items, light is the first. Some people like to turn on the lights when they sleep at night, and some people turn on the lights and read books before going to bed. People are asleep and the lights are still on. Turning on the light to sleep not only wastes energy, but also affects the quality of sleep. The biological rhythm of human body, including biological clock, is naturally formed in the process of adapting to the environment, and "sleeping in the dark" is a routine of human life. If you break this routine, turning on the light at night or sleeping in strong sunlight will cause a kind of "light pressure" on the human body, which will affect the normal metabolic function of the human body, including the normal physiological and biochemical reactions in the body, and even make the heartbeat, pulse and blood pressure of the human body abnormal, leading to diseases. Recently, medical researchers have confirmed that turning on the light while sleeping will inhibit the secretion of a substance called melatonin in the human body and reduce the immune function of the human body. The incidence of cancer is twice that of normal people, such as flight attendants, telecommunications, doctors, nurses and so on. Medical scientists warn that turning on the light to sleep not only affects human immunity, but also easily causes cancer. It is especially bad for babies to sleep with the lights on. Any artificial light source will produce subtle light pressure. The long-term existence of this kind of light pressure will make people, especially infants, feel restless and restless, so it is difficult to fall asleep and the quality of sleep is not good. At the same time, letting the baby sleep under the light for a long time will further affect its eye reticular activation system, which will shorten the baby's sleep time every time, make the sleep depth shallow and make it easy to wake up. Babies sleeping in the light for a long time is greatly detrimental to their vision development. When the eyeball is exposed to light for a long time to sleep, the light will continue to affect the eye, and the eyeball and ciliary muscle will not get enough rest, which will easily damage the retina and affect the normal development of its vision. Studies abroad show that the incidence of breast cancer will double for young women who often work night shifts. Because there is an endocrine organ in the human brain called the pineal gland, it secretes a lot of melatonin when sleeping at night. The secretion of this hormone is the most vigorous at night 1 1 and stops at 2 o'clock the next day. The secretion of melatonin can inhibit the excitability of human sympathetic nerve, reduce blood pressure, slow heart rate, and make the heart breathe, which has the functions of enhancing immune function and poisoning cancer cells. But once the eyeball is exposed to light, melatonin will be inhibited, so people who sleep with the lights on at night will have decreased immune function and are more prone to cancer.
What are the benefits of sleeping? God helps newborns with 20 hours of babies 14- 15 hours of preschool children 12 hours of primary school students 10 hours of middle school students' 9 hours of college students' 8 hours of adults' 8 hours of old people's 6-7 hours of reasonable sleep time is the best for your health. Sleeping too long will have the following disadvantages: first, sleeping too late will disrupt people's biological clock rhythm. Normal people's endocrine and the activities of various organs have a certain day and night law. This biological law regulates people's various physiological activities, making people energetic during the day and sleeping well at night. If you sleep late on holidays because of the law of life, it will disrupt the circadian rhythm in the body and make endocrine hormones abnormal. If this continues for a long time, you will be depressed and depressed. Second, staying up late will affect the gastrointestinal function. Breakfast is usually around 7 o'clock. At this time, the food for dinner has been basically digested, and the gastrointestinal tract will contract due to hunger. People who love to sleep late would rather be hungry than get up early for breakfast. After a long time, they are prone to chronic gastritis, ulcers and indigestion. Third, staying up late will affect the excitability of muscles. After a night's rest, my muscles relaxed more in the morning. Getting up immediately after waking up can increase the blood circulation of muscles and increase blood supply, which is conducive to the thickening of muscle fibers. However, people in bed are in a state of muscle tissue relaxation for a long time, muscle repair is poor, and metabolites are not eliminated in time. After getting up, they will feel weak legs and waist discomfort. Fourth, always sleeping late will affect memory and reduce learning efficiency. Therefore, "getting up at dawn" is a good living habit. Even on holidays, we should keep a normal life rule, go to bed and get up on time.
Girl, what's the harm of not sleeping at night? Staying up late with the help of the great god will cause many kinds of harm to the body: frequent fatigue and decreased immunity. If people often stay up late, the most serious sequelae are fatigue and listlessness; The body's immunity will also decline. Naturally, cold, gastrointestinal infection, allergens and other symptoms of autonomic nervous disorder will come to you. The time from 1 1 to 3 am is beauty time, that is, the time when the human meridians reach the gallbladder and liver meridians. If these two organs don't get enough rest, they will appear on the panel, which is prone to rough, yellow face, black spots, acne and other problems. For those who are not used to going to bed early, they should sleep at 1 am at the latest.
Is sleeping after a full meal harmful to your health? Great gods, help! 1. It is easy to cause the disorder of human digestive function and malnutrition. For some people, it will also cause nutrient accumulation and lead to obesity. 2. Sleeping is easy to have a stroke. After a meal, especially when the amount of a meal suddenly increases, people are more likely to feel sleepy and fall asleep, which will make the full food in the stomach stay for too long and affect the normal digestive function. In addition, a lot of food is in the stomach after meals. For better digestion and absorption, the human body will increase the blood flow of the stomach and intestines. But the blood volume in the body is relatively fixed, so the blood volume in the brain will decrease and the blood pressure will drop. If you sleep at this time, it is easy to form thrombosis and stroke because of insufficient blood supply to the brain.
Is it harmful to eat bananas before going to bed? Great God helps. Summer is the season when a large number of fresh fruits are on the market. Fruit contains a variety of vitamins, minerals, carbohydrates, crude fiber, protein, fat and other essential nutrients ... Eating fruit is not only delicious, but also can promote health, thus achieving the effects of preventing and treating diseases and caring skin. It is the most popular natural healthy food for modern people. But the time to eat fruit should be correct. The best time to eat fresh fruit is in the morning. Eating fruit in the morning is the same, which is the most effective for human body, can give full play to its nutritional value and produce substances beneficial to human health. This is because after a night's sleep, the gastrointestinal function is still in use, and the digestive function is not strong, but it needs to be supplemented with enough nutrition. At this time, eating easily digestible fruits can meet the nutritional needs of work or study activities in the morning. There is an English proverb that "the fruit in the morning is gold and silver from noon to 3 pm, copper from 3 pm to 6 pm, and lead after 6 pm". Eating fruit in the morning can help digestion and absorption, which is conducive to laxative. Moreover, the sweet and sour taste of fruit can make people refreshed and contribute to a good mood all day. On the contrary, eating fruits before going to bed is not conducive to digestion, especially fruits with high fiber content, which is even more harmful to health for people with poor gastrointestinal function. Eat less cool melons before going to bed. Secondly, the best time to eat fruit is 65438+ 0 to 2 hours before meals, so as to absorb the essence of fruit. Because the gastrointestinal digestion of food is not carried out at the same time, but in stages according to the types of food, it takes our stomach about four hours to digest protein, at least six hours to digest fat, and only 1 hour to digest fruit. If fruit is eaten with other foods, our stomach will first decompose protein, then starch, then other foods such as fat, and finally fruit. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? The reason is that fruit is raw. After eating cooked food raw, the body will not produce leukocytosis and other reactions, which is conducive to protecting the human immune system and thus enhancing the ability to prevent diseases and cancers. Eating fruit after meals has no such protective effect. In addition, after eating fruit, fructose contained in fruit can not enter the intestine in time to stay in the stomach for fermentation, resulting in organic acids, which will cause abdominal distension and diarrhea. Fruit should be eaten before meals. Many people have a big misunderstanding when eating fruit: treat fruit as dessert, and the organic acids in it will combine with minerals in other foods, which will affect the digestion and absorption of the human body; Pectin in fruit can absorb water and increase the water content of food in the gastrointestinal tract, so eating fruit after meals will also increase the burden on the stomach. Experts point out that the correct time to eat fruit is before meals 1 hour, and about 2 hours after meals (except persimmons). First of all, many ingredients in fruit are water-soluble, so eating before meals is beneficial to the absorption of essential nutrients. Secondly, fruit is a low-calorie food, and its average calorie is only 1/4 of that of pasta with the same weight, and that of pork with the same weight is about110. Eating low-calorie food first makes it easier to grasp the total calorie intake of a meal. Third, many fruits themselves are easily oxidized and corrupted. Eating fruit first can shorten its residence time in the stomach, reduce the degree of oxidative corruption and reduce the possible adverse effects on the body. In addition, we should also pay attention not to eat fruit before going to bed at night, otherwise the fullness of the stomach will affect sleep. Don't think that eating fruit is a trivial matter. Only by eliminating these misunderstandings can we cultivate truly healthy living habits.
What are the advantages and disadvantages of sleeping more? The great gods help me sleep late, which is harmful to the human body: 1 destroys the biological clock effect. The secretion of human hormones is regular, and sleeping late will disrupt the circadian rhythm in the human body. As a result, hormones can't go up during the day, and hormone levels can't drop at night, which makes people feel exhausted, such as falling asleep at night, being unhappy during the day and yawning. 2 people who sleep late and interfere with the normal function of the nervous system are in a state of excitement for a long time, and they will be tired after a long time. However, if other centers are suppressed for too long, the function of restoring activities will slow down accordingly, so I feel groggy and listless. Material boiling desire expansion, that is the face of all beings! 3 people who affect gastrointestinal function and sleep late should still be in bed when eating breakfast. The stomach has begun to secrete digestive juice and is ready to accept and digest new food. Because you don't eat on time, the gastrointestinal tract is often hungry and peristalsis, and it is easy to get gastritis and ulcer after a long time. 4 Low muscle tension After a night's rest, muscles and joints become more relaxed in the morning. If you get up after waking up and do some activities, you can enhance muscle tension. Through activities, the blood supply to muscles increases, and muscle tissue is in an active repair state. At the same time, it excretes metabolites accumulated in muscles at night. This is beneficial to the thickening and toughening of muscle fibers. People who sleep late often feel weak legs, lumbosacral discomfort and limb weakness after getting up because muscle tissue missed the opportunity to move. The air that "poisons" the breathing bedroom is the most turbid in the morning. Even if the windows are not locked, 23% of the air can't circulate. The polluted air contains a lot of bacteria, viruses, carbon dioxide and dust particles, which will affect the disease resistance of respiratory tract, so people who sleep behind closed doors often suffer from colds, coughs and pharyngitis. High concentrations of carbon dioxide can cause memory and hearing loss. Too much sleep is easy to be obese. People often hear the phrase "eight hours of adequate sleep". Why eight hours instead of more? This is based on science. Sleep time should not be less or more. Clinical practice has proved that excessive sleep is harmful to human health. Too much sleep can easily lead people to become "fat". When people lie in bed, especially after falling asleep, their metabolism and energy consumption decrease. Especially now, their living standards have improved and they are rich in nutrition. If they sleep longer than normal people, the energy in the body will "go in more than out" and accumulate under the skin in the form of fat, which will soon become "fat". People who stay in bed for a long time can do some exercise in bed after waking up and then get out of bed in time. But some people like to stay in bed, which is quite bad for their health. Especially for patients with chronic diseases, if they have the habit of staying in bed, the diseased organs of the body will decline day by day, which will lead to the aggravation of the condition. When people stay in bed for a long time, their activities are reduced, and calcium in bones is easy to fall off. The falling calcium substance will increase the calcium content in blood after being absorbed by blood. The increase of blood calcium will inevitably lead to the increase of calcium in urine, which is easy to crystallize and may form kidney calculi over time. At the same time, long-term bed rest is not conducive to the top-down flow of urine in the urinary tract, which is prone to urinary tract infection. Inflammation of urinary tract mucosa and urine containing bacteria can promote the formation of urinary calculi. Patients with cerebral thrombosis, cerebral hemorrhage and other limb paralysis, such as reduced activity, will also cause kidney calculi in bed for a long time. Four tips to eliminate drowsiness 1 Scratch the palate with the tip of your tongue. Bite the cheek between the upper and lower teeth in your mouth until it hurts. Speak, but keep your voice down to the point where only you can hear it. 4 press your knees hard, or press the armrest of the chair hard with your elbow. This can promote blood circulation and make people sensitive. Sleeping with your arms around is harmful to your health. Many people like to sleep with their heads on their pillows, or put their arms at their sides. In fact, sleeping like this is harmful to health. After a long time, you will feel chest tightness and discomfort, and when it is serious, it will cause reflux esophagitis. Clinical research shows that when sleeping with arms held high, the diaphragm is displaced due to the traction of muscles, which increases the abdominal pressure. This phenomenon is particularly prominent in people who overeat before going to bed, the elderly and women in the third trimester. Sleeping with your hands held high above your head for a long time will cause * * * to the "anti-reflux mechanism". Once the function of this mechanism is weakened or destroyed, it will lead to the reflux of food and digestive juice to esophagus, causing congestion, edema, erosion and ulcer of pipeline mucosa, and causing reflux esophagitis.
What are the benefits of sleeping more? It is human instinct that the great god helps to eat and sleep, and it is 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 what you are now, you will see what you are now. 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, won'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.
No ~ take a nap for about 40 minutes at noon, which is of great benefit to the work in the afternoon. Adults should sleep at least 6 hours, and children should sleep at least 8 hours. Sleeping for a long time is easy to make people more tired, and it is not good for themselves.