As people reach middle age, osteoarthritis is inevitable due to the accumulated wear and tear on the cartilage of the knee joint. If the disease progresses, the joint becomes swollen, deformed, and movement is restricted. The pain reduces movement and leads to wasting muscle atrophy, which further aggravates osteoarthritis and creates a vicious circle; therefore, exercise is very important for the treatment of early osteoarthritis. First, choose bed and water exercises that are not burdensome or less burdensome to the joints, such as changing weight-bearing and running and jumping exercises to swimming and cycling activities; second, enhance muscle strength and joint mobility training to stabilize the knee joint and improve the nutritional status of the joint. Exercises that increase the weight of the joint, such as climbing mountains and stairs, must be eliminated. Straight leg raise exercise lying on your back, straighten your leg up about 30 degrees from the bed, insist 10 seconds, every 10-20 times for a group, training until the muscles have a sore feeling for. Can also be tied to the calf appropriate weight of sandbags for straight leg training; static squat exercises flexion of the knee, hip, but not less than 90 degrees, as a half squat, adhere to 3-5 minutes, every 2-3 times for a group, 2 times a day isotonic, isometric muscle strength training to the hospital or rehabilitation center with special equipment for the corresponding parts of the muscle isotonic resistance muscle strength Training. When possible, isometric muscle strength exercises can be performed to help restore muscle strength better and faster Joint mobility exercises are important because osteoarthritis often has significant flexion restrictions. Flex the knees and hips so that the thighs are as close to the chest wall as possible. You can use your own hands to assist in flexing the knee and hip joints to increase joint mobility water exercise water has buoyancy, which can reduce the weight of the load on the joints, while water has resistance is conducive to muscle exercise. Water walking training and swimming are recommended. Swimming is also an excellent aerobic exercise that can enhance physical fitness; slow walking is a simple and practical form of exercise that is beneficial to the metabolism of cartilage and prevents muscle wasting atrophy. If you suspect arthritis, you should go to the hospital promptly; the doctor will make a judgment by examining the walking ability, the range of motion of the joint, the presence of swelling and pressure pain, and other clinical manifestations; at the same time, an X-ray will be examined to understand the osteophytes and the narrowing of the joint space. There are many ways to treat osteoarthritis of the knee, which can be divided into two categories: first, the early stage is mainly conservative treatment, including weight reduction, drugs, physical therapy and appropriate functional exercise; second, the middle and late stage can be surgical treatment, including bone amputation, cartilage transplantation, arthroscopic surgery and joint replacement, etc.