[milesrout]

>Anyways, "Long-term high-intensity endurance exercise caused some damage to the hearts of amateur runners." and your cardiologist said the same. Or you can believe some rando giving medical advice on this forum. And honestly, I'm beyond irritated at the consistently bad takes on medicine, biomedicine, and exercise on YC HN.

No, his cardiologist apparently said this:

>my cardiologist said that everyone who trains hard for a marathon has some level of heart damage from the excessive training.

There is a huge difference between "some damage observed in some people that do X" and "everyone that does X has damage from doing X". They are completely different statements. They say different things.

Scaremongering about the "dangers" of exercise causes much more harm than exercise does. Even if it were true, it would still be better to have a few heart attacks from exercise than TONS of heart attacks from obesity and unfitness.