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

Because cardio is aerobic respiration, which does not produce lactic acid.

If you use your muscles for a cardio workout, they won’t ache the way they ache if you do a resistance workout.