The Study Of Effects Of Short Term Altitude Exposure On The Aerobic Capacity Of Adolescent Swimming Athletes

Purpose:This study explored the effects of short term altitude training on the aerobic capacity of adolescent swimming athletes by investigating the change of erythropoiesis, oxygen carrying capacity and aerobic capacity during the research, this essay is mainly concerned with infering the rationality of adolescent swimming athletes’short term altitude training, as well as providing reference for adolescent swimming athletes.Methods:A total of31adolescent swimming athletes from the Shanxi Province Team were on a traditional altitude training(2366m) for2weeks. Erythropoietin concentration [EPO], RBC, haemoglobin concentration[Hb], Hct(haematocrit)were respectively measured in the following timepoints:l weeks Before altitude training, the1st, the7th and the14th days of altitude training together with the2nd,7h and14th days after altitude training; Besides, the value of Sp(O2) was measured everyday during altitude training; The lactate threshold velocity(VLT) was respetively recorded in the5*200m incremental swimming tests before, during and after the altitude training. The results are presented as the (M+SD). All of the data were analysed using SPSS16.0.Results:Compared to the baseline value,[EPO] revealed a modest but insignificant rise of24.42%,27.35%and70.56%respectively on the1st,7th and14th day on the altitude. Focusing on the1st day on the altitude, RBC elevated8.06%and [Hb] got a rise of8.13%significantly while Hct declined16.51%. Compared with these figures, the value of RBC,[Hb] among with Hct dropped on the7th day and ascended to the peak on the10th day, while the outcomes of2nd,7th and14th days off the altitude show no significant differences. Sp(O2) reduced to93.9%and fluctuated within a range of1%during the whole altitude training. Compared to baseline, VLT increased1.76%and3.60%on the7th and14th days on the altitude respectively but not significant. The lactate curve shifted rightwards on the7th day on the altitude other than the14th day off the altitude. The CV of [EPO], RBC,[Hb], Hct and VLT were2.25,2.52,2.99,2.16,1.67in rows. Conclusion:A two-week2366m altitude training couldn’t improve the erythropoiesis, transportation of oxygen or the aerobic capacity of adolescent swimming athletes; when considering of the adolescent swimming athletes undertaking altitude training at about2366m, the duration time should be no less than two weeks; There is a significant individual variation among the adolescent swimming athletes in physiology, biochemistry as well as their performance.