What is exactly stamina? What happens when it gets trained? Do your lungs get better and more efficient at pumping air?
In: Biology
Your vo2 max is a large part of it, that’s the percentage of oxygen your body can process out of each breath of air.
If you have more type 1 muscle fibers that also helps, some people are born with more, and are thus more equipped to be endurance athletes.
You can train both of those and see improvements though.
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