Aerobics contains many movements, such as jumping and jumping. These movements have a certain influence on the knee joint. Long-term or large-scale exercise can easily increase the burden on the knee, aggravate the injury of the knee joint and cause obvious pain. Squats and lunges in aerobics, if done incorrectly, will make the knee joint bear more weight. If the jumping action is too large, it will also increase the impact on the knee joint. Excessive pressure on the knee joint will increase the burden and cause knee pain.