When people stand on their toes with their heels off the ground, there is a very thick, strong and tight tendon between the heel and the calf, which is the Achilles tendon. It is from the tibia behind the flounder muscle and from the femur inside and outside the condyles of the gastrocnemius muscle of the two muscles of the tendon joint, is one of the body's most powerful tendons. It is one of the most powerful tendons in the human body. People rely on this powerful tendon for walking, running and jumping. If the Achilles tendon is completely broken, it will be difficult to walk.

The Achilles tendon is about 15cm long, is the body's largest tendon, by the calf triceps (floundering, gastrocnemius internal and external head) tendon in the heel above the formation of about 15cm. It forms a distinct strip-like protrusion on the body surface. The main function of the Achilles tendon is to flex the calf and plantarflexion of the foot, people can jump up, can stomp the ground to run up, rely on it. In addition, the Achilles tendon also affects a person's uprightness.

Achilles tendon ruptures can be divided into two categories: spontaneous ruptures, which are common in athletes and actors, and traumatic ruptures, which are usually accompanied by skin damage or fractures.