Poor resistance can be treated by the following methods: 1. Improving resistance through nutritional therapy. Nutritional therapy focuses on a balanced diet with high quality protein. High-quality protein comes from sea cucumber, milk, eggs, tofu, tenderloin, and deep-sea fish, which can promote the synthesis of antibodies and enhance immunity. 2. Be sure to increase outdoor activities and sunlight exposure. The sunlight exposure can make the vitamin D in the skin become active vitamin D. Active vitamin D can promote the absorption of calcium and enhance bone health, and ultraviolet radiation can kill many bacteria and viruses. 3, increase aerobic exercise and resistance exercise. Aerobic exercise including running, swimming; resistance exercise including flat support, etc.