Tendon is an important part of human body. Except bones, the soft parts of the whole body belong to the category of tendons. According to Chinese medicine, there are 485 main tendons in human body, including muscle _ tendon _ ligament _ fascia _ tendon sheath, synovial sac, joint capsule, nerves and blood vessels, and even articular cartilage and glenoid margin. Tendons need regular exercise, that is, stretching, to maintain elasticity and elasticity. When the tendon loses the opportunity to move, it will be accompanied by joint stiffness and limited movement. As the saying goes, the tendon is one inch long and the life span is extended by ten years. Old tendons are too short to live long. This is of course a slightly exaggerated statement. But stretching tendons can fully help the whole body stretch and relax, which is of great benefit to health. Because meridians and qi and blood circulation complement each other, stretching muscles often can make the blood of the body smooth, and the internal organs will also be smooth, thus prolonging life.