What should I do if I have arthritis? Orthopedic specialists have introduced several groups of flexion and extension exercises, mainly active non-weight-bearing exercises, first to do exercises to enhance muscle strength, and then gradually practice to increase joint mobility. The implementation of fashion need to remember to act according to the strength. Specific methods are as follows: First, lying down “stirrup tricycle” every morning and evening lying in bed, imitating the action of stirrup tricycle. Lie flat posture can reduce the burden of vulnerable joints; to ankle to shoulder joints of each joint are exercised. The patient sits on the edge of the bed with the lower leg of the affected limb hanging down, and presses the affected limb with the help of the healthy limb to increase the flexion. Kneeling knee flexion exercises The patient sits on his knees and presses backwards to increase the angle of knee flexion. The patient sits on the bed with the affected knee as straight as possible, the foot is extended dorsally, the ipsilateral hand presses down on the knee, and the contralateral hand flexes to reach the foot. V. Supine knee flexion exercises Supine bed, the affected limb is flexed at 90°, the affected knee is flexed as much as possible, and the healthy limb is used to assist in pressing the affected calf to increase the flexion of the knee joint.