When you exercise your muscles ache afterwards, so how come your heart doesn’t ache after doing cardio?

Question

When you exercise your muscles ache afterwards, so how come your heart doesn’t ache after doing cardio?

In: Biology

Answer 1

The ache you get in your muscles from exercise, is mainly caused by 2 things:
1. Doing a movement you are not used to
2. Excentrically overloading a movement, meaning, when you “drop” the weights controlled, but kind of cheat it up, for example, trowing a weight up in the air during a bicep curl, but then slowly lowering it.

Your heart does neither of those things. It always performs the same movement and overloading it excentrically doesn’t happen. So it wont usually get sore. It also has a great supply of oxygen and nutrients.