First of all....a little lesson for some background. It is well established in exercise physiology that an increase in EPO production may result in an increase in the number of red blood cells (RBC) and thus an increase in oxygen transport capacity of the blood and that an increase in oxygen transport capacity may result in an increase in the ability to perform endurance exercise. The whole process relies upon the production of volume of red blood cells. The total mass of RBC

A new study on human distance runners and their response to EPO has shown that four weeks of every-other-day injections improves 3000-meter running time by an average of 6%. A month after the end of the EPO injections, the runners were still 3% faster than they had been before receiving any EPO. In a world where just a 3% improvement is considered highly significant, a 6% improvement is very strong, and to have a 3% improvement even a month after injections were finished is n