A. Knee anteversion, which shows that the knee joint is overextended when the affected lower limb is partially or fully weighted, resulting in knee hyperextension when walking and insufficient hip and knee flexion when swinging, which is the characteristic “knee anteversion gait”, and also the “circle gait” of hemiplegic patients. It is also one of the causes of “circle gait” in hemiplegic patients. The foot droops and turns inward, manifesting as the tip of the affected foot droops and the ankle turns inward, and the toe and/or dorsum of the affected lower limb lands on the ground when walking, and the ankle joint is unstable, resulting in sufficient abduction of the affected lower limb to meet the full foot landing when walking, forming a circle-like action. This also greatly increases the patient’s chance of falling. Third, hemiplegic gait, that is, due to a variety of reasons caused by the strengthening of the extensor muscle spasm pattern of the affected lower limb when the hip flexion is not sufficient, knee reversion, foot drop, inversion in the lower limb swing to lift the hip, the affected lower limb slightly flexed hip extension knee position under the abnormal gait of abduction, internal rotation, toe or part of the palm of the foot on the ground generic term.