Moderate exercise is usually allowed after the new crown vaccine, but strenuous exercise or exercise for too long should be avoided as much as possible. Some studies have shown that moderate and low-intensity activities generally do not have significant effects on the body, and appropriate aerobic activities can enhance the body’s immunity. While high-intensity exercise, especially prolonged high-intensity exercise will reduce the body’s immune function to a certain extent, which may be related to the expression of immunosuppressive factors, and this inhibition may last for several days, potentially affecting the production of antibodies. In addition, vigorous exercise tends to make the body sweat a lot, and if it is inadvertently cold, it may easily cause a cold. Sweating may also contaminate the vaccination site, causing local redness, swelling, pain and other uncomfortable symptoms. If there are adverse reactions to the vaccine itself, strenuous exercise may aggravate the adverse reactions. Therefore, after the injection of the new crown vaccine, if no obvious symptoms of discomfort arise, you can exercise moderately according to your own situation, such as walking, yoga, tai chi and other exercises. However, strenuous exercises such as fast running, wrestling, basketball and soccer are not suitable after vaccination. After moderate exercise, you should take rest, avoid overexertion, ensure sufficient sleep, and keep the injection site dry and clean for 1-2 days. Increase the amount of water you drink, avoid drinking alcohol, and try not to eat seafood, mangoes and other allergy-prone foods as well as spicy and stimulating foods.