The onset of osteoarthritis often has certain triggers, such as exertion, increased activity, cold, etc. Therefore, the elderly should not exercise too much. Many elderly people climb mountains and buildings as a daily fitness activity, but these two sports will aggravate the wear and tear of joint cartilage in the lower limbs, which is not suitable for osteoarthritis patients. The same, like some of the original squatting movements will also increase the weight of the joints, not suitable for osteoarthritis patients. Therefore, osteoarthritis patients usually exercise in moderation, when the onset, to reduce or even stop exercise. When the disease is in remission, then gradually resume exercise. Swimming is a more suitable exercise because it is a full-body exercise, but there is no pressure on the joints. Walking is also a good way to exercise. Pay attention to the degree that there is no shortness of breath or palpitation after the activity, and it is appropriate to walk until slightly sweating. You can do some leg raising exercises when watching TV, by tensing your legs and raising them parallel to each other, in order to strengthen the quadriceps. Usually pay attention to the knee joint to keep warm.