The use of stairmaster exercises can cause some damage to the knees of the exerciser. As a special type of exercise equipment, stairmasters need to make movements similar to climbing stairs when exercising, so they can damage the knees to a certain extent, and patients with a history of knee-related diseases such as meniscus injuries should avoid using them. In order to minimize the wear and tear of stairmasters on human knees, it is recommended that exercise be carried out under the guidance of professionals. Exercise with correct posture and reasonable exercise intensity can effectively protect the knee joints, ligaments, meniscus and other soft tissues. When exercising, you should pay attention to reasonable control of exercise time, and combine work and rest. If you suffer from knee injuries during exercise, you should consult a doctor for standardized diagnosis and treatment in order to avoid affecting your subsequent recovery.