What is exactly stamina? What happens when it gets trained? Do your lungs get better and more efficient at pumping air?

Question

What is exactly stamina? What happens when it gets trained? Do your lungs get better and more efficient at pumping air?

In: Biology

Answer 1

No, it’s more that your biology gets more efficient at physical activity via production of specialised cells and set points, so the physical stress is managed well enough to not trigger fatigue and exhaustion