Study on Characteristic Parameters of Oxygen Uptake Kinetics in Different Exercise Test Models

Objective:The characters and relationship of two typical exercise test models were researched in the study.Method:34subject were recruited to finish two exercise test:one was incremental ramp exhaustive test,other was moderate-intensity constant test.The data about oxygen uptake was fitted by linear and nonlinear function models.Results:The goodness R2 of fitting oxygen consumption(VO2)and power(Waat)was 0.932±0.151(P<0.01)by a linear function in the ramp test.The goodness R2 of fitting ventilation(VE)withVO2was0.977±0.012(P<0.01)by nonlinear logarithmic function in the ramp test.In the moderate repetitived test,goodness R2 of fit is 0.96±0.02(P<0.01),whereVO2 changed with time as exponential function.There were significant correlation(P<0.01)between Delta Efficiency,maximal oxygen uptake and VT,whose correlation coefficient was from 0.600 to 0.757;There was no significant correlation between OUES,Delta Efficiency andτ.Conclusion:In ramp test,VO2 was changed with Waat by typical linear features,while there was typical logarithmic function features between VE andVO2,there are significant differences before and after VT in the △ efficiency;and in moderate-intensity constant test,VO2showed a single exponential increase with time in response to the steady-state mode,there were different levels correlation between △ efficiency,OUES and VT,VO2max.