Total knee arthroplasty is a highly effective procedure, but if the success of the surgery is based on the surgical technique without effective rehabilitation, the surgery will not be as effective as it should be. For total knee arthroplasty, functional exercise is as important as the surgery, as it relates to the future function and mobility of the knee. Under the guidance of the surgeon, functional exercises should be started as early as possible and should be based on active activities, supplemented by passive activities. Knee extension exercises are as important as flexion, if not more important. It is normal to feel pain during early activities, so you should not be afraid to move for fear of pain and lose the best practice period (within one week after surgery), which will affect the functional rehabilitation of the knee joint after surgery. It is normal to feel numbness on the outside of the incision after surgery. 3. If you have a tooth extraction, cold or other illness, you should tell your physician that you have had your knee replaced so that antibiotics can be given to prevent infection. 4. After six months, you can swim, play golf and other mild sports, but avoid jumping, squatting, running, tennis, basketball and other strenuous sports; 6. Walking Exercise Precautions Proper walking is the best way to help the knee joint recover, and you need to walk with a walker or crutches at first. The first step is to be comfortable and balanced in an upright position, then move the walker or crutches forward a small distance, straighten the knee on the operated side and move forward, first following the foot to the ground, moving the body forward, then flattening the foot and finally releasing the toes from the ground. The walking frequency, pace distance and speed should be even. When muscle strength and endurance are increased, you can gradually extend the walking time. The best exercise to enhance the strength and endurance of the limbs is to walk up and down the stairs, which requires strength and coordination, and requires help at first until sufficient strength and balance and coordination are regained. General requirements for rehabilitation (exercise) The rehabilitation after total knee arthroplasty should vary from person to person due to the patient’s physical condition, medical condition, psychological quality, subjective requirements, and surgical procedure. In addition, since patients who have undergone total knee replacement have a history of long-term pain, deformity and dysfunction of the knee joint, functional exercise should be performed gradually and not too quickly to avoid undue injury.