Ms. Wang was 38 years old and had breast cancer. She came to our department to prepare for radiation treatment. When asked about her weight, she said, “Doctor, are you asking before or after the onset of the disease? I was fifty kilograms before the surgery, and now I am around sixty-five kilograms. They all say you can’t be tired with this disease. ……” This kind of weight change to Ms. Wang is not an isolated phenomenon anymore. Domestic and international data show that: muscle heat production is high during exercise, and cancer cells are much less tolerant of heat than normal cells and are easier to kill, especially during mitosis deoxyribonucleic acid synthesis. In addition, exercise increases the body’s oxygen intake; exercise increases immune cells; exercise increases interferon secretion; exercise accelerates blood circulation, and cancer cells that appear in the body are washed away like small grains of sand in the rapids, and are unable to take hold, grow and develop, and metastasize and spread in a particular internal organ. Recently U.S. researchers determined that physically exerting activities help female breast cancer patients improve their survival rates. The study used 933 women diagnosed with breast cancer from 1995 to 1998 as a follow-up survey, with data collection completed by 2004. Analysis of the data showed that women who participated in a variety of recreational activities after diagnosis had a 64 percent lower risk of death compared to women who were not active, and that walking for at least two or three hours per week had a 67 percent lower risk of death compared to “sedentary” women. In addition, the risk of death was four times higher for women who reduced their activity level after breast cancer diagnosis compared to those who were inactive before and after diagnosis. The risk of death was 45% lower for women who were previously inactive and started exercising after diagnosis than for women who were inactive before and after diagnosis. This means that the activity level should be maintained before and after the disease, and those who were inactive before the disease should start exercising appropriately at the end of treatment. Our ancestral medicine also believes that exercise can “smooth out the stagnation, relax the muscles and bones and the blood vessels of cancer, transform its misbehavior and slow down its impatience”. It is not only a kind of exercise but also a kind of rest; it not only relaxes the qi and blood but also regulates the spirit; it is not only a walk but also a distraction, which is of great merit. The relaxed and rhythmic pace, deep and harmonious breathing can make people feel calm and relaxed, forgetting the pain and worries of the disease, making the qi and blood full and the positive energy flourish, and driving away the cancer. When Ms. Wang listened to my explanation above, her tightly locked eyebrows gradually spread and she said loudly to me: Now it’s good, I can wear my old fashion again!