Figure 1. ∆VO₂ over the final two 30 s sampling periods of the incremental test to exhaustion, where VO_2dif = the difference between the derived ∆ VO₂ and the prescribed ∆VO₂ criterion value for a plateau response of 1.5 ml.kg^-1.min^-1, where TR 1-4 refer to trials 1-4.