Children's stretching methods can be divided into static stretching, dynamic stretching and ball joint stretching. 1. Static stretching: also known as stretching, it is a stretching form that keeps muscles or muscle groups in a natural stretching posture for 20-30 seconds, which can achieve the effect of relieving tension and increasing flexibility. Commonly used static stretching methods include sitting head forward, stretching against the wall, yoga and so on. 2. Dynamic stretching: also known as active stretching, it is stretching by driving the body to move, such as kicking, swinging and sprinting. Dynamic stretching plays a very good role in the preparation stage and after activities, which can help children warm up and prevent sports injuries. 3. Spherical joint stretching: Spherical joints refer to relatively flexible joints in the human body, such as shoulder joints and hip joints. Spherical joint stretching has a very good effect in strengthening muscle coordination and improving muscle action ability. For example, it can be done by rotating the arm and twisting the waist. It should be noted that children should stretch gently and slowly, and gradually increase the stretching range. The specific stretching scheme should be determined according to children's age, physique, exercise and other factors. In addition, children should try to avoid forced stretching when stretching, so as to avoid adverse reactions such as strain and sprain.