Jim Fixx

James Fuller Fixx (April 23, 1932 – July 20, 1984) was an American who wrote the 1977 best-selling book ''The Complete Book of Running''; he is credited with helping start America's fitness revolution by popularizing the sport of running and demonstrating the health benefits of regular jogging. Fixx died of a heart attack while jogging at 52 years of age; his genetic predisposition for heart problems and other previous lifestyle factors may have caused his heart attack. Provided by Wikipedia