1. Exercise can make people absorb several times to dozens of times more oxygen than usual. Medical research in the United States found that the human body absorbs more oxygen, the respiratory rate is accelerated, through physical gas exchange, can be some carcinogenic substances out of the body, reduce the incidence of cancer, even if you have cancer, the body recovers faster and can extend life. 2. Exercise can greatly reduce the excess fat in the body. Sweating after exercise can make carcinogenic substances such as lead, strontium, nickel and beryllium in the body excreted with sweat, thus playing a role in cancer prevention. 3.Exercise can speed up blood circulation. Cancer cells are like small sand in turbulence, not easy to stand on their heels and not easy to be transferred, and they are easily removed by the immune system. Experimental evidence shows that when the body is in motion, the hourly secretion of interferon from the blood is more than doubled compared to the usual, and the anti-cancer ability of interferon has long been confirmed in observation. 4, exercise can make the human body certain reproductive hormones greatly reduced, or even stop production. Research by scientists at Harvard University found that reproductive hormones are also closely related to cancer, and people who start exercising at a young age can significantly reduce the incidence of cancer. 5. Exercise helps to improve people’s mood and eliminate sleep and worries. Exercise can psychologically reduce the stress of the immune system. Clinical data shows that most of the patients who suffer from cancer are emotionally depressed or traumatized. For them, regular deep breathing exercises, walking or running, soft gymnastics, stretching, swimming, biking or participating in group sports can bring them physical and mental pleasure and joy, help eliminate tension, reduce sleep and improve self-image. Foreign doctors compare exercise to “mild antidepressants” and call it “Western-style qigong”. It functions like Chinese qigong, relaxing the body and mind and improving the body’s functions. Worry and worry often endanger the body’s immune function, exercise can help some people to reduce the mental stress on the immune system damage. 6. Exercise can exercise the will and enhance the confidence and perseverance to overcome cancer. Confidence and perseverance are crucial to overcome many diseases. A poet once said, “Confidence is half of life”. When a person is ill, especially after cancer, he or she should have a strong will, a belief in victory, great perseverance, optimism, great courage, a tenacious spirit of struggle, and an overwhelming spirit of the disease. Experts from British medical schools have observed 57 patients who had their breasts removed due to breast cancer and found that patients who were confident in curing the disease had a 10-year survival rate of 70%, while 80% of those who lost their confidence and despaired after the disease died soon after surgery. Therefore, we have reason to believe that through exercise, confidence and perseverance, coupled with reasonable treatment, there will be a happy situation of “spring in front of the sick tree”.