1, reasonable diet structure, pay attention to the appropriate amount of calcium supplementation. Learn to eat scientifically and pay attention to calcium intake. Daily diet must be a variety of food appropriate mix to meet the body’s needs for a variety of nutrients. Daily diet should include five categories: the first category is cereals and potatoes; the second category is animal food; the third category is legumes and their products; the fourth category is vegetables and fruits; the fifth category is pure caloric food (including vegetable oil, starch, edible sugar and wine). The nutrients provided by each food group are not the same, and no one food can supply all the nutrients needed by the human body. In addition, middle-aged and elderly people should pay attention to eating more calcium-containing foods in their diets, such as milk and soy products, which are rich in calcium and have high utilization rate. Shrimp skin, sesame paste, kelp, walnuts, melon seeds, potatoes, etc. can increase calcium intake. In addition, eating less spicy and stimulating food, as well as cold and greasy things, and eating more vegetables and fruits, is also beneficial to the protection of the knee joint. At the same time, there should be more outdoor activities, increased sunlight exposure and vitamin D supplementation to promote calcium absorption. 2. Exercise your joints reasonably to avoid joint damage. People with osteoarthritis should avoid overworking the knee joint and also carry out appropriate functional exercises to increase the stability of the knee joint and prevent muscle atrophy in the legs, which not only relieves joint pain but also prevents the progress of the disease. Some people who suffer from arthritis are afraid of pain, afraid to move, or even bedridden, which is actually not good for protecting the joint, but over time can cause a series of complications such as patellar aging, osteoporosis, and muscle atrophy, further aggravating the damage and instability of the joint. After suffering from arthritis, the correct and appropriate exercise can enhance the strength of the muscles and ligaments, delaying and slowing down the process of arthrosis. 3, reduce weight. Obesity often increases the burden on the joint surface, accelerating the wear and tear of the joint structure, aging, causing deformation arthritis. Obesity can also indirectly affect the joints through other metabolic complications, such as abnormal glucose tolerance, dyslipidemia, etc. 4, pay attention to walking and labor posture, do not twist the body to walk and work. Avoid prolonged squatting, long-term squatting work, such as auto mechanics, sand turners, it is best to sit on a small bench to a low sitting position, long periods of sitting and standing, but also to frequently change positions to prevent the knee joint fixed a posture and excessive force. Cycling is a good form of exercise for the treatment and prevention of osteoarthritis, but we should pay attention to the height of the seat, to sit on the seat of the two feet in the pedals, the legs can be straight or slightly bent as appropriate, the seat is too high, too low or riding uphill when the pedal force, the knee joint have a negative impact. 5, avoid joint injuries. Regular participation in sports exercise can enhance the strength of muscles and ligaments, which is conducive to the enhancement of joint stability, and can also improve the flexibility of the joints, which has a positive effect on the prevention of joint injuries. Keeping the joints moving in a normal activity trajectory is an important measure to prevent chronic joint strain injury and to master the scientific training methods and means. In the case of falls and collisions, homeopathic buffering is a very effective and reasonable self-protective action. For example, when you fall, do not use your hands to support the ground, you should take the initiative to lower your body’s center of gravity and try to land on your hips first, with your body as a group cushion, if you have to use your hands to support the ground, you should immediately flex your wrists and elbows, and land on the back of your shoulders, with your body as a group cushion. When the joints are twisted, the body should do homeopathic buffering action, do not hard top, otherwise the tissues outside and inside the joints will be damaged, serious fracture and rupture will occur. 6, prevention and control of osteoporosis. Prevention of joint disease to pay attention to the health of the bones. The serious consequence of osteoporosis is fracture, of course, also includes various joint parts. To start eating a calcium-rich, low-salt and moderate protein diet, such as milk, from childhood, focus on sun exposure and physical exercise. 7.Practice good habits. Pay attention to prevent the joints from moisture and cold, especially in the season of climate change, and sweating, after drinking, sleep, wind, cold and humidity are most likely to attack the disease. When the knee joint is cold, the blood vessels contract and blood circulation becomes poor, which often makes the pain worse. Girls should not wear high heels for a long time. It is better to wear loose shoes with flexible soles, such as casual shoes with a sloping heel, which can reduce the impact of gravity on the joints and reduce the wear and tear on the joints. You can change to a pair of flat shoes when you feel your feet are tired on your way to and from work or in the office. The elderly should not lift heavy objects, should not climb high, carry heavy objects, so as not to cause joint damage. 8, pay attention to self-examination, early diagnosis and treatment. When there is repeated knee pain, soreness, leg pain downstairs, or uncomfortable joints when the weather changes and other symptoms, you should pay attention to, these are the initial signs of joint disease. When there are typical symptoms of joint disease joint pain, swelling and reduced joint movement function should be promptly checked and diagnosed at a regular hospital. With symptomatic treatment, protection and exercise, early joint disease can relieve symptoms, improve function, delay the course of the disease and correct deformities.