Stay away from the muscle blocks that girls are afraid of, dynamically stretch muscles and heart and lungs before exercise, prevent static stretching after exercise, relax muscles, relieve soreness, stretch for a long time, increase muscle elasticity, improve flexibility, increase exercise mobility, and make the whole body muscle lines smoother. Today is even better. I'll share some little knowledge about stretching with you. Stretching is divided into active stretching and passive stretching. Active stretching refers to mainly relying on the strength of contracting muscles. Instead of other external forces to keep the action in a specific position, active stretching is also called standing still and active stretching. The advantage of active stretching is that it can increase the flexibility of action and contract muscle strength. For example, standing on one leg and lifting the other leg to keep this posture still is a very standard active stretching.