Public release date: 28-Oct-2007

Exercise may reduce, and even reverse, bone loss caused by hormone and radiation therapies used in the treatment of localized prostate cancer, thereby decreasing the potential risk of bone fractures and improving quality of life for these men, according to a study presented on October 28, 2007, at the American Society for Therapeutic Radiology and Oncology’s 49th Annual Meeting in Los Angeles.

Men with localized prostate cancer frequently receive radiation therapy followed by months of hormone therapy to treat their cancer. Radiation is used to kill the cancer cells, while hormone therapy decreases testosterone and estrogen that feed the cancer cells, thereby keeping the tumor from growing. Men undergoing hormone therapy lose between 4 to 13 percent of their bone density on an annual basis, compared to healthy men who lose between .5 to 1 percent per year, beginning in middle age. Men are typically not thought to be at risk for osteoporosis and bone fractures; however, their rate of bone loss is greater than that of post-menopausal women.

The study shows that prostate cancer patients undergoing hormone therapy that walked about five times a week for 30 minutes at a moderate pace maintained or gained bone density, while those who didn’t exercise lost more than two percent of their bone density in eight to nine weeks.

***Ralph’s Note – That was 4% to 13% bone density loss every year.