Effects of Training Status and Exercise Intensity on Phase II &OV0312;O2 Kinetics

Abstract

Phase II .VO2 kinetics became progressively slower at higher power outputs in both trained and untrained subjects. That a greater tau1 was evident at a higher power output within the moderate exercise intensity domain (<GET), where O2 availability is presumed not to be limiting, indicates that the slowing of the phase II .VO2 kinetics may be attributed to other factors besides O2 availability such as the recruitment of higher threshold motor units.