In clinical practice, patients who experience knee pain after sitting for a long period of time may experience pain due to injury to the quadriceps muscle group in the knee joint, or injury to the cartilage, meniscus, or fat pad in the knee joint. In addition, if a patient has osteoarthritis of the knee joint, the patient will experience pain due to the proliferation, degeneration or calcium loss of the bones in the knee joint, which will lead to the impaired nutrient metabolism of the local muscles after sitting for a long time, and will be accompanied by the weakening of the local muscles and the limitation of knee flexion and extension and weight bearing. Therefore, patients should be instructed to perform appropriate knee activities to strengthen the local muscles and increase the stability of the knee joint, which can relieve pain.