Excessive exercise, especially if you're still focusing on traditional endurance cardio like long-distance running, can be particularly troublesome if you have a heart condition.

Both Forbes1 and Time Magazine2 recently highlighted research from Sweden and Germany showing that regularly exercising intensely for extended periods of time could do more harm than good in those with a history of heart disease.

That said, such warnings should not be taken as advice to stop exercising! It's important to remember that exercise has also been shown to prevent heart disease as effectively as medications.