My cousin has been a lean long distance runner all of his life. Recently, in his early fifties, he decided that old joints can't take so much, so he dropped his running to an hour per day (plus an hour of walking.) Never smoked, eats healthy, all that. He knew he had high cholesterol but didn't take drugs for it, preferring diet and exercise, with his doc's concurrence. Two days ago, at the finish line of a half marathon, he had a heart attack at age 54.

Main arteries were 90% (ninety per cent) occluded. This has turned my view of the world upside down.