Another example illustrating the genetics component. Jim Fixx.
Originally Posted By: Trav
Let me give you an example of a real family, mine. Grandparents on fathers side still alive 98 and 96 yrs old living at home and in very good health. Grandfathers older brother 105 living at home and doing fine. Grandfathers other older brother dies at 107 did great till the end. Grandparents on mothers side lived into their 80's and 90's Great grandmother on mothers side died at 99 she was not so good from about 95 on. Uncle dies at 86 years old. My parents are in their late 70's and doing fine. All smoked, drank (some to real excess), didn't care what they ate, never used vitamins and stayed clear of doctors. Uncle dies at 86 in a moped road accident, he was well hammered when he fell off driving home from the pub, he had a non filter hanging out of his mouth when they found him. This is pure genetics and a lot more than 20% i'm sure. All survived WWII, uncle was sunk twice in the north sea. This is pure luck.
Genes = 20%
Exercise guru drops dead at age 52.
James Fuller Fixx (April 23, 1932–July 20, 1984) was the author of the 1977 best-selling book, The Complete Book of Running. Best known as Jim Fixx, he is credited with helping start America's fitness revolution, popularizing the sport of running and demonstrating the health benefits of regular jogging. On July 20, 1984, Fixx died at the age of 52 of a fulminant heart attack, after his daily run on Vermont Route 15 in Hardwick. The autopsy revealed that atherosclerosis had blocked one coronary artery 95%, a second 85%, and a third 70%. Granted access to his medical records and autopsy, and after interviewing his friends and family, Cooper concluded that Fixx was genetically predisposed (his father died of a heart attack at age 43 and Fixx himself had a congenitally enlarged heart)