http://articles.mercola.com/sites/articles/archive/2003/09/24/exercise-cancer-part-two.aspxModerate physical activity, such as walking or biking, reduces the risk of breast cancer by 20 percent, even when started later in life. Researchers found that regular exercise lowered breast cancer risk even among postmenopausal women and those at highenCommunityServer 2008.5 SP1 (Build: 31106.3070)