[Objective]To investigate the influence of different altitudes alternate training on EPO. [Methods] Dividing the male athletes living in the plains into the plateau-plain group and plateau-subplateau group. During the whole training, Picking a venous blood to test erythropoietin index every week. [Results and Conclusion] by the double stimulation of exercise and low oxygen, carrying oxygen ability of blood of the two groups are improved, but the effect on the plateau-subplateau group is better than plateau-...