The Finnish skier Eero Mäntyranta probably owed much of his success to his polycythemia, significantly increasing the number of red blood cells and thus the oxy

The Finnish skier Eero Mäntyranta probably owed much of his success to his polycythemia, significantly increasing the number of red blood cells and thus the oxygen-carrying capacity of his blood. Since red blood cells are produced in the bone marrow, a transplant could be used to deliberately induce polycythemia. However, a quick search for bone marrow transplants for polycythemia yielded only results about curing the disease with transplants. Probably not a great idea, especially considering it would likely be considered a form of doping and get banned.