Static stretching: Stretch the active muscles during exercise until they feel completely taut, and keep 15 ~ 30 seconds. Static stretching can relax muscles and help relieve body stiffness and pain. Finishing activities: generally, you can shake your arms, turn your waist and shake your legs. To promote blood return and actively relax muscles. Massage: generally, it should be done after 20 ~ 30 minutes of exercise. At first, you can do nudging, kneading, pinching, pressing and patting, accompanied by local shaking and passive activities. Warm water immersion: immersion in warm water at 30 ~ 400℃ has a calming effect on heart activity and nervous system. It should be noted that general muscle soreness and fatigue are actually beneficial-this proves that exercise has achieved results, and through rest, recovery and relaxation, physical fitness will be improved than before.