There are several common reasons for joint noise during fitness: First, irregular fitness movements, such as the elbow joint being completely straight when bench press, and the knee joint not keeping the same direction with the toes when barbell squats, will all lead to joint noise and joint pain. Second, the heavy load during fitness, such as barbell bench press, will lead to noise in elbow joint and shoulder joint, which can cause articular cartilage damage; When the barbell lifts the shoulder joint, it will also cause the shoulder joint to make a sound due to excessive weight.