The knee joint is one of the most complex and injury-prone parts of the body, relying on ligaments and muscles to maintain its stability. If an external force causes the knee to rotate or flex excessively more than the ligaments can withstand, then damage to the ligaments can result. The knee has four groups of ligaments: the anterior cruciate ligament, the posterior cruciate ligament, the medial collateral ligament and the lateral collateral ligament. Knee instability caused by ligament damage must be treated in a timely manner, otherwise the wear and tear of the articular cartilage caused by the instability of the joint can lead to osteoarthritis over time, which can seriously affect the life of the joint. Therefore, prevention of knee ligament injury is the key, so how exactly should it be prevented? Please see the following information. Avoid or reduce the following movements and strengthen the muscles around the knee: stopping or turning during sports – standing firmly on the ground and turning the leg in the other direction such as soccer or basketball players stopping and changing direction quickly; landing with a straight knee – landing with the knee straight For example, a skier landing after a jump or a gymnast landing on a vault; Lateral landing with knee hyperextended – a sudden stop with the leg in hyperextension, such as a baseball player experiencing additional force on the knee while sliding sideways to reach the base; Rotation and sudden deceleration – sudden deceleration and foot twisting traces into -Sudden deceleration and foot twisting traces into excessive knee rotation, such as a sudden combustion turn by a soccer or rugby player. Proper landing technique is important to prevent knee injuries. It is recommended that sports landings should be forefoot first, with the knee bent and the torso leaning slightly forward. Avoid lateral or back-and-forth knee movements whenever possible. Remember not to twist the knee inward when landing and to minimize the impact.