Abstract

The objective was to investigate if performing a sub-peak or supra-peak verification phase following a ramp test provides additional value for determining 'true' maximum oxygen uptake ( O2). 17 and 14 well-trained males and females, respectively, performed two ramp tests each followed by a verification phase. While the ramp tests were identical, the verification phase differed in power output, wherein the power output was either 95% or 105% of the peak power output from the ramp test. The recovery phase before the verification phase lasted until capillary blood lactate concentration was ≤ 4mmol·L-1. If a O2 plateau occurred during ramp test, the following verification phase was considered to provide no added value. If no O2 plateau occurred and the highest O2 ( O2peak) during verification phase was < 97%, between 97 and 103%, or > 103% of O2peak achieved during the ramp test, no value, potential value, and certain value were attributed to the verification phase, respectively. Mean (standard deviation) O2peak during both ramp tests was 64.5 (6.0) mL·kg-1·min-1 for males and 54.8 (6.2) mL·kg-1·min-1 for females. For the 95% verification phase, 20 tests showed either a O2 plateau during ramp test or a verification O2peak < 97%, indicating no value, 11 showed potential value, and 0 certain value. For the 105% verification phase, the values were 26, 5, and 0 tests, respectively. In well-trained adults, a sub-peak verification phase might add little value in determining 'true' maximum O2, while a supra-peak verification phase adds no value.

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