Osteoarthritis is a common condition that afflicts middle-aged and older people. The femur and tibia of the human knee are covered with very smooth cartilage that wears away as we age. (As shown on the left, the left side is healthy articular cartilage and the right side is diseased cartilage; of course, most of our patients are not that bad.) This is the most basic principle of what is called osteoarthritis of the knee. If you know the basic principles of osteoarthritis of the knee, it is easy to understand how to protect your knee joint. That is, to avoid weight bearing and further wear and tear. How can I protect my knee joint? 1, pay attention to warmth 2, action support: mainly to reduce the weight of the affected joint, cane, crutches, walkers, etc., to change the negative gravity angle, according to the deformity, using the corresponding orthopedic support or orthopedic shoes; 3, functional training: such as the knee in the non-weight-bearing position flexion and extension activities to maintain maximum joint mobility; 4, aerobic exercise: such as swimming, bicycles, etc.; 5, weight loss: obesity can be through the metabolic process 6. Self-protection: Do not squat or kneel down to get things, sit on a low stool, sleep on a low bed to increase the friction and weight on the joints. 7. Bad posture, avoid running, jumping, squatting for a long time, reduce or avoid climbing stairs.