1. Swimming: Warm-up activities should be done on the shore before launching, otherwise sudden and strenuous activities will easily cause muscle injury or other accidents. Lift your legs, squat, and stand up. Matters needing attention in swimming include: when diving, you must know the water depth and underwater conditions to prevent accidents such as bumping, and at the same time, you should avoid your abdomen being directly hit by the water surface and protect your ears, because your ears are hit by water. It will make the eardrum sag inward and even rupture, causing deafness. If there is water in your nose, don't squeeze your nose and blow hard. After swimming, wash your whole body with clear water to avoid infectious diseases.

2. Pilates: a kind of whole-body coordinated exercise that mainly exercises the small muscle groups in the deep layer of the human body, maintains and improves the normal posture of the appearance, achieves the balance of the body, emphasizes the control of the core muscle groups, strengthens the nerve induction and domination of the human brain on the limbs and skeletal muscle tissues, and then cooperates with the correct breathing method;

3. Running: Running is a daily and convenient way of physical exercise and an effective way of aerobic breathing. Remember not to drink water immediately after running, or squat or lie down. You should do some relaxation exercises, which will help to relieve fatigue.