As for red blood cell count. For athletes of sports other than strength sports or bodybuilding will also note that boldenone is quite likely the most favorable steroid for them to use as it also stimulates the release of erythropoeitin in the kidneys. Erythropoeitin is a hormone known as EPO and heavily abused among endurance athletes because it signals the body to increase the production of red blood cells (erythrocytes). Red blood cells are the carrier of oxygen in the body, meaning that a higher maximal oxygen capacity can be obtained and better performance can be achieved over longer amounts of time before lactic acid is built up, which would in turn result in cramps and a cessation of the activity at that level. In short it improves your stamina. For bodybuilders this characteristic may be useful in promoting increased vascularity.