Osteoarthritis often causes joint pain, and localized pain due to knee osteoarthritis is a very common phenomenon. The main manifestations of knee osteoarthritis include pain in the knee joints during activity and joint stiffness that tends to occur with inactivity. There is no cure for knee osteoarthritis in the elderly, but the main goal is to control symptoms (pain and stiffness), improve mobility and improve self-care. Patients with knee pain need appropriate exercise to relieve symptoms and also to help control the progression of the disease. However, some elderly patients rarely exercise precisely because they are afraid of joint pain. The consequences of lack of activity not only aggravate muscle and joint stiffness and worsen pain, but may also lead to muscle atrophy and weakness, and even paralysis. Research has proven that although exercise may produce some pain in patients with knee pain, it does not lead to an aggravation of the condition, and once the body has adapted to this exercise, the pain and stiffness will be reduced. So, how should knee pain sports be performed? Generally speaking, it is better to choose gentle exercises with low impact, such as walking, tai chi, and moving the lower limbs in place. If you can often choose the following targeted exercise therapy, to reduce knee pain, relieve joint stiffness can play a significant effect. 1, straight body kneeling: after rising in the morning or before going to bed at night, two knees in bed to practice kneeling. Kneeling when the waist pole remains upright, the hips sit back as far as possible, trying to reach the rear of the foot. 2, squatting leg press: hand on the edge of the bed to do squatting action, and then do straight leg press action, that is, let the affected side of the lower limb half a step forward, in a straight position or lower limb outstretched, placed at a certain height, gently do leg press movement, hand as far as possible to touch the toe. 3, high horse stance: two knees slightly bent (20-40 degrees), to the knee joint does not hurt. Squat still, both hands flat, eyes front, start to adhere to a few minutes, and gradually increase the time. Generally reach about 10 minutes each time you can, do 1 time each day morning and evening. 4, supine leg lift: supine bed, the affected leg upwards about 15 degrees, the initial do can be maintained for 1-3 minutes, after a period of practice, air leg lift time to strive to reach 10-15 minutes. Subsequent exercises can also be used to pick a pillow with the foot to increase the strength, 2-3 times a day. This method is mainly to strengthen the leg muscle strength.