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

The blood running through your body carries oxygen to your muscles. When training, your muscles become more efficient and can function with less oxygen. The out of breath feeling when you are running is basically your oxygen supply drying up so your lungs are burning trying to keep up with the demand you’ve put on you muscles. The larger the muscle, the more oxygen required to operate. Like the other person said vo2 max is what it comes down to.