Biological clock, also known as biological rhythm, refers to the phenomenon that organisms change periodically at any time, including physiology, behavior and morphological structure. Scientists have found that biological clocks are various. As far as the human body is concerned, more than one hundred species have been found. The biological clock has a great influence on people's health. The rest and rest of the whole human being in a day and night cycle, the physiological indexes of the human body, such as body temperature, blood pressure and pulse; Physical strength, emotion, intelligence and women's menstrual cycle; Signals in the human body, such as brain waves, ECG waves, meridian potentials, changes in human electromagnetic fields, etc., will change periodically with the change of day and night. No one denies that this series of phenomena has nothing to do with human health. Science has found that when the biological clock is disordered, human beings and even all life are prone to illness, aging or death. Some people's biological clocks have been relatively stable for decades and they are in good health. Once the biological clock is broken and in a state of disorder for a long time, it will produce various discomforts or diseases, and some even endanger life. It is said that the trademark of European famous jujube whisky is the head of a long-lived old man who lived 152 years old. At that time, the king of England wanted to see the long-lived old man, so he invited him to the palace to eat, drink and have fun to show his hospitality. Who knows, because the law of life was suddenly changed, the old man died a week later. In our life, there are also some old people's health. They have worked all day for decades and become healthier and healthier. One day, due to their filial piety, they were given a rest time to "enjoy the rest". As a result, they either felt uncomfortable or could not afford to get sick. Some newly retired old people are not as healthy as when they go to work, which is related to the sudden change of biological clock. We believe that young people should understand, discover and master their biological clocks as soon as possible, and then gradually adapt to them so that they can play a positive role. The elderly should cherish the biological clock formed in decades and don't change it easily, so as not to cause disorder of the biological clock and affect their physical and mental health. Filial sons and daughters, don't let the old man indulge your's filial piety easily. According to a survey, in a health care and rehabilitation center for the elderly, several 90-year-old people were in normal physical condition and mental state at home, and their children sent them to the center to get good medical security. However, in less than half a month, all these old people died "disease-free". Whether this has anything to do with the old man's biological clock being changed, we can't get into it. However, we believe that understanding, mastering and adapting to the biological clock will help to maintain and improve people's physical and mental health.

How to adjust the biological clock?

In winter, people's appetite has increased, but this does not mean that the human body needs more calories in winter, which is caused by the change of the operation of the "hormone clock" when the climate is cold.

Scientific research has found that cold in winter affects the endocrine system of human body, which increases the secretion of thyroxine and adrenaline, thus promoting and accelerating the decomposition of protein, fat and carbohydrate, enhancing the body's ability to keep out the cold, resulting in excessive loss of heat. Therefore, nutrition in winter should be based on increasing heat energy, and foods rich in carbohydrates and fats can be properly ingested.

For people who are weak and have no serious diseases, according to their own physical conditions, they can appropriately choose some foods with the same origin of medicine and food, such as red dates, Euryales, Coix seed, peanut kernels, walnut kernels, black sesame seeds, lotus seeds, yams, lentils, longan, hawthorn, caramel and so on. With nutritious food, it can achieve the purpose of keeping out the cold and nourishing.

For obese people, winter is a good time to lose weight and control obesity. At this time, obese people should eat less dinner and arrange lightly. Because the nutrients ingested by the human body are easy to be converted into fat and stored at night, at the same time, there is little activity at night. If the dinner is rich, it is easy to cause blood lipids to rise and deposit on the blood vessel wall, laying a hidden danger for arteriosclerosis.

Women should increase their intake of inorganic salts and vitamins in winter, especially calcium and iron. Old people, children, people with weak constitution or patients with chronic consumptive diseases have poor physiological cold tolerance, and the cold is a great threat to them, especially the need for high-quality protein. Protein, fat and carbohydrate should keep a reasonable proportion, accounting for 13%- 15%, 25%-35% and 60%-70% respectively.

Old people should often eat coarse grains, miscellaneous grains and potatoes in winter. Such as corn, buckwheat, oats, sweet potatoes, potatoes, goat's milk, rabbit meat, animal liver, animal blood, tofu, sesame paste, brown sugar, shrimp, shrimp skin, colorful leafy vegetables, etc. are all suitable for winter eating.

In addition, winter tonic to keep out the cold, adjust the diet at the same time, should be cold-resistant exercise, enhance adaptability. If we ignore the physiological cold tolerance of human body, blindly rely on food to keep out the cold, and eat too much food and alcohol with high calorie, energy and fat, it will cause and aggravate cardiovascular diseases. And after a winter, you may grow more fat, which will bring many adverse effects to people who are already fat or have poor cardiovascular function. Therefore, in winter, we should insist on proper exercise, such as Tai Ji Chuan, walking and playing ball games, which can promote metabolism, speed up the whole body blood circulation, enhance the digestion and absorption of nutrients in the gastrointestinal tract, and truly achieve the goal of eating out benefits.

How to adjust the biological clock

After a long period of review and preparation, many candidates have formed the habit of staying up late. Some people are even too lazy to get excited until around 10: 00 in the morning. If you are still in this physiological state when you arrive at the college entrance examination, it will be very unfavorable. You should pay attention to adjusting your biological clock.

The biological clock of human body is a long-term physiological reflection. If you want to adjust to the best state, you should start about half a month before the exam. The first exam of the college entrance examination usually starts at 9 am. If candidates want to ensure that they have enough energy and moderate excitement, they should arrange their daily life completely according to the schedule and gradually adjust their biological clocks during the college entrance examination.

The first step is to get rid of the habit of staying up late and not sleep late the next morning. Specifically, you must go to sleep before 22: 00 every night and get up around 6: 00 ~ 6: 30 the next morning. After getting up and washing, exercise, read a few pages of review materials, and then have breakfast at around 7: 30. In this way, around 9 o'clock, the whole person has gradually entered an excited state. In order to adapt to the exam, candidates can find some papers and try to do them between 9: 00 and 1 1. In this way, you can review and feel moderately nervous.

After lunch, candidates should also rest for about an hour according to the needs of the college entrance examination before reviewing. So that they are in a moderately excited state every time they take an exam.

Biological clock is also called biological clock. It is an invisible "clock" in the organism, which is actually the inherent rhythm of life activities in the organism and is determined by the time structure order in the organism.