What is exactly stamina? What happens when it gets trained? Do your lungs get better and more efficient at pumping air?
In: Biology
Another component of stamina is the amount of hemoglobin in our blood. Hemoglobin is on red blood cells and is what carries the oxygen from our lungs to our muscles. When you do endurance training, your body will respond by making more hemoglobin. The higher the amount of hemoglobin in your blood, the more oxygen you can get to your muscles with each heart beat.
Pro athletes take drugs to increase hemoglobin, or will sometimes do “blood doping”, where they remove a bunch of their own blood, concentrate the red blood cells, save it in a freezer, wait for their body to replace the missing red blood cells, then reinject the original blood cells into their veins giving them a higher concentration than when they started.
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