Abstract: Objective: To research the changes of blood parameters on different time points after micro-rHuEPO injection on young men and hope to provide evidences for Athletic Biological Passport (ABP) using in the detection of blood doping.Methods: Fourteen health young men were injected with micro-rHuEPO for 7 weeks, twice per one week.The subjects were treated with ferralia 105 mg every day during the injections.The control group was administrated with the same volume of saline solution injection and placebo 105 mg.The blood parameters (red blood cell, hemoglobin, reticulocyte, total hemoglobin, plasma volume, etc) were tested 11 times (7 days before the first injection, 3, 10, 17, 24, 31, 38 and 45 days after the first injection, 1, 2 and 3 weeks post the seventh week of last injection).By analyzed these total and concentration parameters, hope to know the effective of two kinds of parameters on ABP.Results: The levels of RBC and[Hb] were increased sharply after two weeks of injection and reached the peak in 5-6 weeks (9-10%, P<0.01).It sustained till 3 weeks after the last injection.Total hemoglobin was increased significantly during the whole procedure of injections and reached the peak in week 5 (10%, P<0.01) till 1 week after the last injection.Red blood cell volume was increased with the EPO injection and reached the peak in week 5 (P<0.01), but blood volume wasn't increased significantly.Plasma volume was decreased with EPO injection and it was hemoconcentration.Conclusion: It can enhance the total and concentration parameters through 7-week micro-rHuEPO injections and the total haemoglobin is more sensitive.So tHb can be used to detect blood doping in ABP.At the end of the last injection, the total blood parameters, such as the total hemoglobin, returned to normal, while the concentration index remained highly, possibly as a result of blood concentration.

Key words: micro-rHuEPO injections, total hemoglobin, hemoglobin concentration, athletic biological passport, doping