Moderate exercise is immune-boosting. Studies have shown that aerobic exercise, strength training all promote the circulation of vital immune cells, which in turn reduces the risk of infection. Exercise has the effect of transporting immune cells from peripheral immune organs (spleen, lymph nodes, and bone marrow), such as neutrophils, monocytes, natural killer cells, and killer T-cells, to the bloodstream and lymphatic vessels for rapid entry into the systemic circulatory system. Exercise can also stimulate macrophages to function and improve viral defense. In addition, exercise can promote blood circulation and the distribution of immune cells throughout the body. All of this action can enhance immunity. It is important to note that if exercise is too strenuous or strenuous, it can reduce immunity. In addition, if you are found to have low immunity, you need to consult a doctor in time and standardize the treatment, not just exercise as a treatment.