Figure 5. Pearson product moment correlation coefficients between the time constant for the phase II3 of pulmonary oxygen uptake and the mean response time for the fundamental increase in muscle oxygen uptake for low-intensity exercise (A; r= 0.95) and recovery (B; r=−0.01) and high-intensity exercise (C; r= 0.95) and recovery (D; r=−0.40).

Note the close agreement for the on-transient and the poor agreement for the off-transient.