Bicycling can cause knee injuries because the process of bicycling requires repeated flexion and extension of the knee joint, and although the weight is not too heavy, the knee joint is still under some pressure. The patient’s knee flexion and extension activities under weight can cause wear and tear on the knee cartilage and even meniscal damage. The injury is especially likely to occur if the patient’s muscles are not strong enough. Therefore, patients need to pay attention to protecting the knee joint when riding a bicycle, avoiding strenuous pedaling, while keeping the toe in line with the patella as much as possible, and avoiding random twisting of the knee joint, so as to reduce the knee joint injury and protect the function of the knee joint. The leg muscles should also be strengthened to enhance the strength and power of the quadriceps and other muscles to further protect the knee joint.