Examinationof Oxygen Uptake Kinetics in Decremental by a Numerical Computation Model Load Exercise

The purpose of this study was to cstablish a numerical computation rnodel for estimation of oxygen uptake (VO.) kinetics in decremental oad cxercisc (DLE) starting from a work rate {WR) above thc vcntilatory thrcshold (>VT). In the model, WR in DLE were separated into scvcrul steps (constant ]oad excrcise, CLE) of which the durations increased stcp by step. VO]. kinetics in each step was estimated using an exponential equation, and the sum of V02 values from all steps at a given time was regarded as simulated VO! in DLE, In the modcl, thc timc constants wcrc set symmetrically in a step VT at onsct and oflliet (Tliff) of exercise, As a result, simulated V02 qua[itativcly, but not quant{tativcly, approximated measured VO,. Consequently, we incorporated a ncw model in which a step >VT was subdivided into scveral parts, Although there was a slight difference quan{itative]y, the interva] of subdivision of 3.0 min and T,ff of 2.8min allowcd tbr qualitativc approximation. The numerical computation modcl adopted in this study is usefui Ibr estimation of VO, kinetics during DLE starting from high intcnsity (>VT). J Physioi Anthropol 27ewr 247-254, 2008 hrtp:11www.jstage.jst.go.jpfbrowse/jpa2 [DOI: 10,2114ijpa2,27.247]