Not really. The dude got into fitness since men in his paternal line were kicking the bucket in their late 30's early 40's.Jim Fix, the 1970's jogging guru died at a young age.
Wikipedia:
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. He died of a heart attack while jogging at 52 years of age
Kind of ironic