People who keep their brains youthful and energetic tend to forget things after the age of 40, which is a manifestation of brain degeneration. In order to slow down the speed of brain degeneration, the following measures can be taken: (1) Be diligent and active when you are young, master and store a lot of knowledge, and learn how to consider and analyze problems. (2) After middle age, read more books, cultivate various interests and keep the flexibility of the brain. (3) Pay special attention to arteriosclerosis and diabetes, because these diseases will accelerate the degeneration of the brain. (4) Keep a happy mood, avoid anxiety and think more at work. (5) ensure adequate sleep, long-term insomnia will degrade the brain. (6) Long-term monotonous work is easy to cause brain fatigue, so we should change our mood in time to keep it in the best condition. Self-care of middle-aged people The middle-aged period is the most developed and energetic stage in life, the most vigorous period of various physiological functions and the most burdensome period. Therefore, doing a good job in health care in middle age can not only delay aging, but also prevent various diseases. Generally speaking, middle-aged people should first take care of themselves by taking care of themselves. They can neither stay in a boring job for a long time, nor be pampered. Secondly, we should be open-minded and keep a good mental state. Third, we should pay attention to diet conditioning and moderate diet. Fourth, we should pay attention to proper sexual life, because excessive sexual life will consume too much kidney essence and damage health. Fifth, we should have regular health check-ups, especially for middle-aged people over 40, so as to achieve early detection and early treatment. There are "five commandments" in middle age. Middle age is an "eventful autumn" with "crisis". We should actively prevent some common hidden diseases and pay attention to the "five precepts". First, quit laziness: Middle-aged people often feel that their legs are heavy and easy to get tired, indicating that aging has quietly arrived. At this time, pressure should restrain laziness, often participate in sports activities, and delay aging. 2. Don't overwork: Middle-aged people have both work and housework, so the burden is heavy. Therefore, they should pay attention to the combination of work and rest, and don't "fish with exhaustion" and break down from overwork. Three commandments and eat more: eating more will lead to obesity, which will induce many diseases. Anger under temptation: Anger will damage the liver and easily induce gastric ulcer, hypertension and coronary heart disease. Five precepts of indulgence: Chinese medicine believes that "overwork at home hurts the kidney." The best time for health care and exercise is at least six or seven o'clock in the morning one or two months before winter and spring. The sun comes out early in summer and autumn, and the exercise air is fresh at 5 ~ 6 in the morning. Usually doing exercise in the morning 10 and at 3 ~ 4 pm is very beneficial to your health. The best time to lose weight by walking is about 45 minutes after a meal, and walking for 20 minutes at a speed of 4.8 kilometers per hour is most beneficial to lose weight. If you walk for 20 minutes 2-3 hours after meals, the effect will be better. The best sleep time is usually between 8 ~ 12 in the evening, and the sleep amount of these four hours accounts for 75% of the total sleep amount. So it's best to rest from 9 pm to 2 am. The best time to brush your teeth is because the bacteria in your mouth begin to decompose the acidic substances in the food residue 3 minutes after meals, and corrode and dissolve the enamel. Therefore, the best time to brush your teeth should be within 3 minutes after each meal and 3 times a day. Middle-aged mental workers exercise and walk: Regular exercise and walk is helpful to enhance heart function and lose weight. The heart rate of middle-aged mental workers aged 40 ~ 49 is about 120 ~ 130 beats/min (female index can be increased by 5 ~ 7 times). We can use the comprehensive self-feeling such as appetite, sleep and fatigue to evaluate whether the amount of exercise is appropriate. Fitness running: At the beginning of training, the running speed and distance should be appropriate. The suitable exercise intensity for healthy middle-aged mental workers is pulse number 180 minus age. The test method is to measure the pulse of 10 second immediately after running, and then multiply it by 6 to measure the pulse number per minute that marks the intensity of exercise. Fitness shop: Choosing bicycle or fixed pedal exerciser can enhance the oxygen absorption ability of mental workers and improve the muscle strength of legs and buttocks. According to the experimental measurement, the energy consumption standard of 200 ~ 300 calories (middle-aged men) and 200 calories (middle-aged women) can be reached every 30 minutes when pedaling hard. Fitness swimming: Swimming is an exercise program suitable for middle-aged mental workers. It has a positive effect on enhancing cardiopulmonary function, limb muscle strength and balance ability. Middle-aged and elderly people should pay attention to waist exercise. With the increase of age, kidney qi gradually declines, bones are decalcified, ligaments, muscles and intervertebral discs of lumbar joints are prone to degenerative changes, and lumbar pain or discomfort often occurs. Some people with severe premature senility even have lumbar curvature, rickets and frequent backache. The best way to prevent backache and strengthen the kidney and waist is to always pay attention to the exercise of the waist. Paying attention to waist exercise can improve the blood circulation and metabolism of spine, improve the blood supply of kidney, improve the ability of kidney to eliminate metabolic waste, delay the aging process such as osteoporosis and decalcification, enhance the toughness of joints, improve the elasticity and flexibility of spine and joints, and make the human body agile and tall. There are many exercises to exercise the waist, such as Tai Ji Chuan, Yijinjing gymnastics, ball games and so on. In addition, you can choose some actions of turning and bending, or you can do the following methods to strengthen your waist and kidney: 1? 6? Stand at 1, hold your waist with both hands, lean forward slightly, slowly twist your waist left and right, and gradually accelerate, so that your waist has a fever, once a day in the morning and evening. 2. Method of rubbing Shenshu point: When lying on your back, sit on the bed every day, with your feet drooping, loosen your clothes, hold your breath, hold your tongue against the upper jaw, look up visually and shrink your anus. Rub Shenshu (under the second lumbar vertebra, one and a half inches apart, about the same as your belt) for about 120 times. If you can keep exercising, it will be good for strengthening the kidney and waist. Lying flat several times a day is good for the health of middle-aged and elderly people. If you can lie flat for 5 ~ 10 minutes every 2 ~ 3 hours in various busy activities in a day, you can greatly reduce the load and load of various parts of the body, especially the internal organs and joints such as the waist and knees, so that the whole body can be relaxed, which is conducive to the disappearance of physical health and fatigue and the recovery of working ability. This method is especially suitable for middle-aged and elderly people and people with weak constitution or some special diseases, such as gastroptosis, nephroptosis, varicose veins of lower limbs, uterine prolapse, vaginal prolapse's disease, hemorrhoids, hypertension, cardiovascular insufficiency, lumbar disc herniation, knee and ankle joint diseases of lower limbs, obesity and abdominal muscle relaxation. Experiments have proved that for people with "weak" physique who are thin and tall and have a tendency to droop their internal organs,