Knee degeneration is an inevitable trend and is closely related to injury, age, gender, hormone levels, obesity, exercise, lifestyle, and genetic factors. If you pay attention to the protection of the knee joint in daily life, you will delay the degeneration or reduce the symptoms, so that the knee joint healthy “service”. 1. Weight control The main causes of knee degeneration are long-term weight bearing, wear and aging of the joint, and calcium loss. Many middle-aged and older women are the main victims of knee osteoarthritis, and weight control is the most direct way to reduce the weight on the knee joint, which is very important to slow down the aging of the joint. 2, scientific exercise Currently, there is a common confusion: whether to maintain the knee joint or not to exercise? One view is that exercise may accelerate knee degeneration, while another is that exercise is beneficial in any form. Our advice is that exercise is necessary from both a preventive and a therapeutic point of view. Exercise can make bones strong and muscles powerful, and can enhance the nutrition of cartilage in the joint, improve and delay the aging of cartilage, which is the fundamental way to prevent knee degeneration. However, the key is to master the scientific method of exercise. (1) Cycling and swimming are beneficial: In general, cycling and swimming are two activities that are gentle and have the least impact on the knee joint. (2) Climbing hills and stairs is not advisable: middle-aged and elderly people should avoid participating in fitness exercises with high impact on the knee joint, such as jumping rope, playing volleyball and other jumping exercises, as well as climbing hills and stairs. Although climbing hills and stairs is a good way to exercise, it is not good for protecting the knee joint. Because the knees are weighted when climbing up hills or stairs, and there is a downward force in addition to their own weight when descending, the impact will increase the damage to the knee joint. Moreover, the curvature of the knee joint increases when climbing stairs, and the pressure between the patella and the femur increases accordingly. (3) The body’s center of gravity should not be too low: Secondly, the elderly should raise the body’s center of gravity as much as possible when playing Taijiquan. When you are ready to stand after squatting in life, you can use surrounding objects (such as tables, chairs, etc.) to “support a” in order to reduce the “pressure” on the knee joint. (4) Do not run too fast and too hard: Although running can enhance the elasticity of joint ligaments, but the elderly can not run too fast, the foot on the ground not too hard, it is best to land on the forefoot, you can also choose special sports shoes to cushion the vibration of the leg, to prevent knee injury. The knee joint is not as rich in muscle and fat tissue protection as other joints, but a “skin and bone” part, poor blood circulation, if cold for a long time, it may be due to local vascular spasm contraction to make the blood supply less, thus weakening the metabolism of cartilage and immune defense, so that the articular cartilage surface occurs Ischemia, or even necrosis, can lead to arthritis. So the elderly should always take appropriate protective measures for the knee according to the changes in temperature and humidity. For example, it is best to wear cotton pants in winter; wear knee pads before taking long walks; try not to wear skirts in winter or on rainy days; do not sit for long periods of time when playing cards, chess or mahjong in a cooler environment, and move or massage the knee joints regularly; rinse the knee joints with hot water when bathing on weekdays, and do not rinse with cold water immediately when sweating heavily on hot days. 4. Enhance nutrition and regular checkups Joints, like other parts of the body, also need adequate nutrition. Middle-aged and elderly people should pay attention to whether they have osteoporosis. They can have regular bone density checkups and take calcium and vitamin D supplements under the guidance of professional doctors to slow down the rate of bone and joint degeneration.