Exercise is not recommended two months after a knee sprain. Forced exercise at this time, especially exercise with high intensity may aggravate joint and ligament injuries. Knee sprains may involve the anterior and posterior cruciate ligaments, meniscus, medial and lateral collateral ligaments, synovium, cartilage, and other tissues within the knee joint. It usually takes 3 months or more to repair, and in severe cases, there may be ligament tears, meniscus tears, and ruptures that require surgery. A knee sprain that has not healed in two months means that the condition is more serious and requires prompt medical attention to clarify the condition through MRI of the knee joint, ultrasound of the muscles and bones, and other tests. In addition, it is usually necessary to use a knee brace, cast for immobilization. Therefore, it is not suitable to exercise at this time, especially exercise with high intensity, such as running, fast walking, jumping, etc., which may aggravate the condition and cause adverse consequences. Two months after the knee sprain is not yet well recommended timely medical treatment, standardized treatment, such as the need for rehabilitation training, to be carried out under the guidance of the doctor, to avoid causing secondary injury.