Research shows regular exercise prevents reproductive and colon cancers in men and women.
Carried out at the University of California, San Francisco, a study of 71 men with a low risk of prostate cancer showed that genes controlling cell cycling and DNA repair were upregulated in men who performed at least three hours of vigorous exercise a week. The duration as well as intensity of activity were important.
Regular exercise has a wide range of health benefits. In addition, it lowers the risk of death from all causes. How exercise impacts cancer risk isn’t clear. It seems that both inactivity and overtraining impact the risk of some cancers.