Prevention of cramps: 1. Don't do long or strenuous exercise in a poorly ventilated or closed space. 2. Enough water and electrolyte should be added before, during and after long-term exercise. 3. Get enough minerals (such as calcium and magnesium) and electrolytes (such as potassium and sodium) in your daily diet. Minerals can be taken from milk, yogurt, green leafy vegetables and other foods, and electrolytes can be obtained from bananas, oranges, celery, natural foods or some low-sugar drinks. 4. Don't wear too tight or heavy clothes when you are exercising or working. 5. Check whether the protective stickers, jackets, shoes and socks are too tight before exercise. 6. Make full exercise preparation and stretching exercises before exercise. 7. Keep warm properly after exercise in cold weather. If you swim, put on your bathing suit and warm clothes immediately. 8. Engage in sports or work in a relaxed mood. 9. People who are prone to cramps when sleeping at night need to do some stretching exercises before going to bed, that is, stretching the cramping parts. 10. Don't exercise excessively. 1 1. Massage the cramped muscles properly before exercise. Five, the treatment of cramps rest → massage → muscle elongation reason: when the muscle is elongated, the tension of the tendon will increase. When the tension reaches a certain intensity, the nerve will send a pulse to the brain, and the brain will release information to relax the cramped muscles to avoid tendon injury.