Why testosterone increases heart size but aerobic training does not ?

Question

I understand that heart issues are caused by the “pumped” heart in people that take testosterone. But why the aerobic training is beneficial? Doesn’t it also increase musculature in the heart ? Especially something like HIIT

In: Biology

Answer 1

I think it is important to note that it is unnaturally high testosterone levels that causes unnatural increase in heart size.

Aerobic exercise does affect heart size and shape.

If you could give unnaturally high aerobic stress to the heart, then likely the effect would also be negative to the heart.