Somebody very close to me (not me) is a workout-aholic. They work out at least 1.5 hours a day, every day, they are fit looking, active, etc. At 44 they were just diagnosed as having had a "silent" heart-attack and they were told they might need open-heart surgery. Makes you wonder why you should workout..... Actually not, but it is sad to see somebody that takes care of themself very well, that does not smoke, drink, etc. have heart problems at such a young age.