Correct scientific use of rowing machine is generally not damage to the knee, if the movement, posture is not standard, too long or resistance beyond the range of their legs can withstand will cause damage to the knee. The main cause of knee injury is in the process of sports collision, overexertion, sprain and other reasons, rowing machine can cause damage to the knee knee and individual sports posture, exercise length, their own capacity are related. 1. Pay attention to the posture: in the use of rowing machine center of gravity to be stable, avoid swaying, and in the process of knee flexion and extension to avoid the phenomenon of left and right bending, otherwise it will cause some damage to the knee joints, such as caused by ligament strain around the knee joint, meniscus injury. 2. Pay attention to the length of the exercise: the best control of the exercise time is less than half an hour. 3. pay attention to their own capacity: in the choice of rowing machine resistance, should be based on their own situation, to avoid overloading the knee joint. Should be reasonable exercise, do not overload exercise.