The Achilles tendon is a tendon between the distal end of the muscles of the posterior calf and the heel, and is formed by the convergence of the gastrocnemius tendon and the hallux valgus tendon extending downward, ending at the heel tuberosity. The Achilles tendon is composed of connective tissue and is very hard in texture. The Achilles tendon is important for the body to stand, walk, run and jump and maintain balance. Whenever a person lifts the heel, the Achilles tendon must be engaged in a contracted state, and without the involvement of the Achilles tendon, significant flexion and extension of the ankle joint cannot be accomplished. The Achilles tendon is very strong, in soccer, basketball and other strong physical sports, the Achilles tendon has to bear 8 times the body weight of the pulling load; and in other ordinary activities, the Achilles tendon generally also has to bear 9 thousand Newton load. Excessive athletic loads, excessive exercise time, and incorrect exercise (e.g., not warming up sufficiently before exercise) can bring about Achilles tendon injuries – tiny ruptures of the Achilles tendon fibers and, in severe cases, the production of some inflammatory mediators. These chronic sterile inflammations may involve the Achilles tendon and its surrounding tissues and eventually develop into Achilles tendonitis, leading to decreased flexibility and increased brittleness of the Achilles tendon. And when these injuries accumulate beyond the limits of what the Achilles tendon can withstand, the Achilles tendon will rupture. Therefore, it is common for professional athletes to have Achilles tendon ruptures because the rate of accumulation of Achilles tendon injuries is much higher than that of ordinary people; heavy people also have a higher probability of Achilles tendon rupture than lighter people because their Achilles tendons have to withstand more straining loads than ordinary people. Achilles tendon rupture clinical symptoms: 1, there is a clear history of trauma, the patient reported that the Achilles tendon was attacked and can hear the rupture sound, tear-like pain, forcing the patient can not stand upright, walking. 2, closed Achilles tendon injury, local swelling is obvious after the swelling to be reduced can be found in the depression fracture, pressure pain sharp. 3, dysfunction: foot plantar flexion resistance pain, muscle strength is reduced or disappeared. Can not lift the heel, the Achilles tendon reflex disappears. How to prevent Achilles tendon rupture 1, before exercise, to do a good job of warm-up activities, if necessary, to use some joint brace, to prevent the Achilles tendon rupture due to the stiffness of the Achilles tendon. 2, sports, sports methods should be correct, to avoid straightening the knee joint and weight jumping, according to their physical condition to choose the appropriate intensity of exercise, according to their ability. 3, for special groups, such as overweight people to lose weight, short-term weight gain faster people are more likely to occur Achilles tendon rupture; long-term sedentary people, to increase the amount of activity to avoid long-term stiffness of the Achilles tendon, the literature shows that the incidence of white-collar sitting office Achilles tendon rupture higher. 4, previous Achilles tendon pain or Achilles tendonitis people, to timely medical treatment, do not let the hidden chronic Achilles tendon injury develop into Achilles tendon rupture, so as not to aggravate the disease. Achilles tendonitis patients need to pay attention to: Achilles tendonitis patients are best to find a sports medicine specialist or professional institution to carry out systematic and scientific treatment. While taking oral non-steroidal painkillers, topical medications, and physical therapy, it is still important to maintain a reasonable amount of exercise, not the less exercise the better. Patients can do daily stretching exercises for the muscles at the back of the calf, such as heel lift exercises, which can help the recovery of Achilles tendonitis.