Prostate cancer certainly isn't a death sentence - and men who have it can reduce their chances of dying even further by exercising for just 15 minutes a day. Prostate cancer victims can lower their chances of dying from the disease by around 35 per cent just by jogging, swimming, biking or playing tennis for three or more hours a week. Even walking offered benefits, and men who walked four or more hours every week had a 23 per cent lower risk of dying from the cancer. The study, carried out by the Harvard School of Public Health, was based on research involving 2,686 prostate cancer patients. (Source: American Association for Cancer Research's Frontiers in Cancer Prevention Research Conference, December 8, 2009).