Stretching after exercise can relieve muscle soreness, promote blood circulation and prevent lactic acid accumulation. It can also help to improve the resilience of the body, improve the flexibility of the body, reduce the risk of injury in future sports and improve sports performance. Fully and effectively stretching muscles is beneficial to body relaxation and blood circulation, providing nutrition for target muscles and promoting muscle growth. Stretching can also relax muscle fascia, prevent muscle stiffness and beautify muscle lines. Stretching is also a good relaxation training. With breathing, the heart rate can quickly return to normal, reducing the risk of sudden death due to strenuous exercise. If you miss stretching 10 minutes after exercise, the risk of muscle soreness and injury will increase greatly in the next exercise. Each stretching should be controlled at about 30 seconds, so as to avoid strenuous stretching and muscle strain.