Can too much exercise lead to a heart attack?

Pace yourself: Regular exercise lowers long-term risk by improving many heart risk factors. But if someone already has plaques & inflammation in their arteries, a heart attack could occur during exercise, esp if we overdo it like extreme weightlifting (which makes blood pressure shoot up) or getting very dehydrated racing on a hot day. Use common sense by building up workouts gradually under safe conditions.

Possible: Usually the other way around! but one can precipitate with too much in the face of atherosclerosis. 86 year old shoveling snow as example.