With a narrower knee gap, you can choose exercises that put less weight on the knee joint, such as swimming and quadriceps exercises. Swimming is a very small load on the knee joint, not only can reduce the pain or discomfort of the knee joint, but also exercise cardiorespiratory function. Quadriceps exercise can also be carried out, take a seated position, double lower limbs naturally drooping, first lift a leg, try to lift, so that the thigh lifted away from the bench surface, adhere to 10 seconds, put down, and then lift the other leg, generally 5 times for a group, 40 times a day each. When there is a narrowing of the knee joint gap, you should avoid lifting heavy objects, climbing, going up and down the stairs and other activities that are more weight-bearing on the knee joint, the above exercises need to be carried out under the guidance of a doctor, to avoid the condition being aggravated due to improper personal operation.