How does building cardio work?

Question

I understand that lifting weights make you stronger because the muscle breaks and then recovers to become stronger so then you can lift even more weight, but how does running make you resist more time running? does your lungs get bigger or something like that?

In: Biology

Answer 1

Cardio comes directly from the greek καρδιά, kardia meaning heart.

You are making your heart stronger, this is done by keeping it working hard for long amounts of time. So having high heart rate during exercise increases cardio.

Lungs have an effect aswell from exercise. It will strengthen your diaphragm muscle that causes the lungs to contract. Lungs are like a balloon, they cannot expand by themselves, but you either have to blow into them, or make the surroundings lower pressure. https://youtu.be/5rbl6PwjyXk?si=h77vYYplw0MJdFsX