Oxygen kinetics for constant work loads at various altitudes

kinetics for constant work loads at various altitudes. J. Appl. Physiol. 35(4): 497-500. 1973.-Oxygen kinetics were observed for eight male subjects who performed at three intensities of work (30, 60, 80 % vo2 nlax) on a bicycle ergometer at 223, 2,286, and 3,810 m simulated altitude. The data suggest that the time to steady-state Vo2 is related to the intensity of the work, being more delayed the greater the intensity. Vo:! steady state was reached in 6 and 20 min for work at 30 and 60y0 of aerobic capacity, respectively, independent of altitude. Vo2 steady state was not reached in any of the subjects for work at 80y0 of aerobic capacity. The 02 uptake process from the onset of exercise approaches an asymptotic value in an exponential manner directly related to the intensity of the work. At 30y0 of Voa lzlstX the rate of 02 uptake at time t can be adequately described by a single exponential function.,4t 60% of VO2 max, however, the rate of 02 uptake at time t requires a