Physical activity and colon cancer. A systematic review of potential mechanisms

Authors:Quadrilatero, J. and Hoffman-Goetz, L.
"There is currently little empirical data to support any of the hypothesized biological mechanisms for the protective effect of exercise on colon cancer. Moreover, it is likely that no one mechanism is responsible for the risk reduction observed in epidemiological and animal studies and, therefore, the observed benefits of physical activity in colon cancer may be a combination of these and other factors."