Trained athletes, specifically endurance athletes, have been found to have a decreased hematocrit, sometimes called “sports anemia”.
This is due to an increased plasma volume, which is accompanied by an increased total mass of red blood cells and hemoglobin.
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Sometimes professional endurance athletes are caught with elevated hematocrits. The implications of having a hematocrit that is too high for how good of shape you are in can be grounds…
The Athlete’s Paradox - trifitla.com
However, it has been found that trained athletes, specifically endurance athletes, have a decreased hematocrit, sometimes called “sports anemia.” Athletes actually tend to have an increased total mass of red blood cells and hemoglobin, but the decrease in hematocrit by training is due to an increased plasma volume
A New Way to Determine Athletic Performance - University of Delaware
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