Repeated flexion and extension of the knee on a rowing machine has the potential to injure the meniscus. Meniscus is padded in the femur medial and lateral condyles and tibia medial and lateral condyles between the articular surface of the two semilunar fibrocartilaginous plate, respectively, known as the medial meniscus and lateral meniscus. The medial meniscus is larger, was “C” shape, the front end of the narrow back wide, the outer edge of the joint capsule and the tibial collateral ligament is closely linked; lateral meniscus is smaller, was “O” shape, the outer edge of the joint capsule is also connected. Long-term, a large number of rowing machine knee repeated flexion and extension can cause meniscus tear and wear, there can be affected knee pain, swelling and joint interlocking and other symptoms, the symptoms are light only pain, no activity limitation; heavy often accompanied by joint swelling, activity limitation, etc., can be accompanied by the corresponding ligament of the knee joint damage, quadriceps muscle atrophy and joint popping. Daily training through the use of rowing machine should pay attention to the control of exercise intensity and time, reasonable exercise, to prevent damage to the knee, resulting in meniscus and other structures and tissues of the injury.