Just 10 minutes of intense exercise can flip genetic switches that help stop bowel cancer in its tracks. Credit: Shutterstock As people return to gyms or start new fitness routines in the new year, new research suggests that even a short burst of intense exercise could play a role in protecting against cancer. Scientists report that as little as 10 minutes of hard physical activity may help slow cancer growth. The study found that brief, vigorous exercise quickly changes the mix of molecules