Effect Of High-Altitude Training On Hemopoiesis And The Intervention Of Iron Supplyment In Race Walkers Of Altitude Residents

Purpose:to study the change of hemopoiesis during high-altitude trainning,and the influence of iron supplement intake on hemoglobin. To determine whether the altitude of 3300m can make necessary hypoxiaemic stimulus on elite race walkers of altitude residents.Methods:Serum EPO,Hb,Ret were tested before and 3rd day at high-altitude as well as 7th day descent from high-altitude where stayed one week in elite male race walkers(N=8),who are prolonged residency at altitude. Compare SF and Hb value between iron and non-iton supplement intake group at high-altitude.In the experiment,training and meals are same between two groups.Results:1.Serum EPO increased on 4th day during high-altitude training(P＜0.05),a strong interindividual variability was observed.There was no difference between before and 7th day leaving high-altitude.2.Comparing to before high-altitude,RBC and HCT had no change(P＞0.05), Ret decreased(P=0.050)and IRFdecreased significantly(P＜0.01) on 7th day descent from high-altitude.3.Hb increased on 3rd day,but not markedly.After decending slightly on 4th day,it raised gradually,and reached peak value on 9th day(P＜0.05). But the time when Hb reached peak had indivdual variability.4.ΔEPO on 4rd day andΔHb on 14th day,ΔEPO%and the time of Hbmax had significantly positive correlation. 5.SF decreased in non-iron supplement intake group and increased in iron group after high-altitude training. Conclusions and Suggestion:1.High-altitude training can make a positive effect on hemopoiesis in elite male race walkers of altitude residents.It can make necessary hypoxiaemic stimulus.A strong individual variability must be considered during high-altitude training.2.Iron reservior decreased on 7th day after descent from haigh-altitude. Iron supplement intake during high-altitude can improve iron reservior, and make the peak value of Hb higher but later.3.It is necessary to evaluate body iron status before high-altitude training.Good iron reservior is important for Hb at high-altitude.4.It is important to hemogrammonitor for subjects who have higher Hb.