The human ankle joint is a very important pair of weight-bearing joints. It is the pivot between the foot and the lower leg, so its function is extremely important. It is the most important joint for stabilizing the body and maintaining balance during walking and running, and even jumping movements, but at the same time it is not as thick as the knee and hip joints and lacks muscle protection, making it the most injury-prone joint in the body! It is composed of the distal tibia and fibula, which make up the lower leg bones, and the talus, which is located in the center of the ankle joint. The main structural function is dorsiflexion and plantarflexion, which is what people call “foot extension and hooking”. Of course, it also has some rotational function, which is often referred to as “turning the ankle”. Compared to the knee and hip joints, such a thin joint needs special stabilizing structures to maintain stability. Therefore, there are several strong ligaments growing on the medial and lateral sides of the ankle joint, which are the medial and lateral collateral ligaments respectively. The back of the ankle joint is mainly the Achilles tendon to help stabilize it, so the front of the ankle joint, especially the part without tendons passing through, is the weakest part of the ankle joint; and because the lateral fibula is lower than the medial tibia (you can feel and see the most prominent part of your ankle joint, the lateral side is lower than the medial side), that is, the lateral side has a part of the fibula to block the action, so the ankle joint is most likely to be sprained to the medial side, and it is most The anterolateral part of the ankle joint is most likely to be damaged, which is the most common tear of the anterior talofibular ligament and anterolateral joint capsule in clinical practice. In addition, the ankle joint has a very important proprioceptive function, that is, the function of maintaining body balance. It is mainly realized by the muscles, tendons, joint capsule and ligaments together, of course the muscles and tendons are the most important, and this function is mainly built up through life and sports later in life, so this ability is closely related to the intensity and type of sports the body engages in. Generally speaking, people who keep exercising for a long time have relatively strong proprioception and balance of the ankle joint, which means they are relatively less prone to sprains. Once the important stabilizing structures around the ankle are injured, it will not only cause the main clinical symptoms such as pain and swelling, but also cause a decrease in balance and muscle strength around the ankle joint, thus slowing down the recovery time of the ankle injury. Therefore, whether the ankle has not been sprained, or has been sprained and has passed the acute injury period (this time varies from a few days to a few weeks depending on the severity of the injury and requires a specialist examination to determine, most sprains are around 3 weeks; there is also a relatively simple way to determine that the injured side of the foot can basically walk normally on the ground), the muscles around the ankle joint Strength and balance exercises are very important.