If there's anything the average person knows is supposed to prevent or treat heart disease, it's regular exercise.
For anyone worried about their ticker, the answer has usually involved some form of "Get out there and get moving!" — even for those who've already had a heart attack.
Johns Hopkins tells survivors: "Exercise can be a frightening proposition in the aftermath of a heart attack. ... But recent research indicates that a reasonable amount of regular exercise is the best way to strengthen the heart after a heart attack."
But, like most things, moderation is key, and a new study says some heart attack survivors take it way too far.