The stability of the hip joint is maintained mainly by the strength of the muscles and ligaments around the joint to strengthen it, so the training action is to strengthen the surrounding ligaments and muscles, and the specific time when you can do or what kind of action you can do depends on your own underlying disease. In general, the strength of the surrounding muscles and ligaments should be exercised without weight bearing, such as lying on the bed and trying to lift the legs up, so that the thighs are as close to the abdomen as possible, to do the range of motion of the joints. The whole process of movement must be slow lifting, slow release, do about 10-20 will feel the muscle soreness, heat, indicating a good exercise effect. As the condition progresses you can do squats, cycling and swimming and other exercises with less weight, which can exercise the strength of the surrounding muscles and not overload the joints.