[Concentration of lactic acid in the blood and erythropoiesis during exposure to hypoxia].

The data obtained with the aid of additional hypoxic load (blood loss, ascending in a barochamber) reveal a considerable lactacidemia occurring prior to erythropoiesis activation which corroborates the theory of activation of the erythropoietin formation with lactic acid. The degree of lactacidemia in blood loss was found to depend on the duration of adaptation to high altitude, lessening after a prolonged stay at moderate altitude. Responses to acute hypoxic hypoxia during adaptation to moderate altitudes were shown to differ both individually and depending on the sex of animals.