Knee replacement for one year, usually can return to normal. After knee replacement, if you follow the doctor’s instructions for rehabilitation exercises, generally 3~6 months can return to normal, most patients can fully recover after one year and can engage in general physical activities. Early exercise after knee replacement surgery mainly focuses on knee flexion and extension exercises, which can be performed with the help of CPM (joint restorer) or isotonic contraction exercises for quadriceps and hamstrings under the guidance of a rehabilitator. In the middle and late stages, you can exercise at home to work on the strength of the quadriceps and core muscle training. After the knee replacement surgery, you should try your best to avoid climbing, squatting, walking up and down the stairs or lifting heavy objects, etc., to avoid actions that increase the pressure on the knee joint. Patients are advised to visit the hospital regularly for follow-up visits.