Why is it healthy to strain your heart through exercise, but unhealthy to strain it through stress, caffeine, nicotine etc? What is the difference between these kinds of cardiac strain?

Question

Why is it healthy to strain your heart through exercise, but unhealthy to strain it through stress, caffeine, nicotine etc? What is the difference between these kinds of cardiac strain?

In: 12816

Answer 1

I don’t think there is evidence that caffeine causes any heart damage. In fact, the opposite. Up to about 6 cups of coffee a day is shown to have positive CV health effects.

Edit: as a few have pointed out, there are rare cases of overdosing, which may be due to other factors or perhaps a predisposition or susceptibility to caffeine.

https://www.jacc.org/doi/abs/10.1016/j.jacc.2013.06.035