After a patella fracture, it is necessary to fix and immobilize the patella for some time. During the immobilization, knee joint stiffness may occur, affecting the flexion and extension movements of the knee. Therefore, while treating a patella fracture, it is also important to guide the patient in functional exercises. For example, during the early stages of immobilization, the patient can actively contract the quadriceps femoris and the triceps surae to prevent thrombosis. This muscle exercise can also help avoid muscle atrophy. Additionally, patients can be instructed to dorsally extend the ankle joint to strengthen the ankle pump training and avoid ankle stiffness. Once the fracture is stabilized, the patient can sit beside the bed and let the knee bend naturally. When close to the bed, the knee can bend up to ninety degrees. If natural bending is difficult, the healthy limb can be used to push the injured limb closer to the bed, allowing the knee to bend to ninety degrees. After reaching ninety degrees, it might be appropriate to use crutches for walking activities. If bending beyond ninety degrees is necessary, the patient should lie flat on the bed, hug the thigh of the injured limb with both hands, flex the hip joint, and then allow the knee joint to bend through gravity beyond ninety degrees, approaching the normal range.