But most experts of the United States feel that the most effective method is movement, even though they also have  this discovery as the 2009 one of  ”Ten medical breakthrough”.

    Exercise can prevent cancer is mainly because one aspect is which can reduce the transmission time of food within intestine, so that carcinogenic substances in food would be absorbed less time can be effective in preventing colon cancer and other gastrointestinal tumors. Another aspect is regulating the body hormone level, which can prevent breast cancer and hormone levels related to cancer; third aspect is regulating the immune system, healthy immune system is the most important part of cancer prevention. Now the United States many people will movement on 30 minutes a day.

    As for the best exercise prescription for the U.S. Sports Institute experts say, jogging, cycling, swimming and other aerobic exercise most appropriate. Exercise 3-5 times a week, each about 30 minutes and exercise intensity should be controlled in exercise heart rate does not exceed 70% of maximum heart rate, not less than 50% of maximum heart rate.

which can significantly reduce the ultraviolet radiation in human cells caused by damage to genetic material, thus it

 can help prevent skin cancer.