“…During a maximum Cardiopulmonary Exercise Testing (CPET), different ventilatory data are obtained with clinical, diagnostic and/or prognostic implications 1 , such as maximum oxygen consumption (VO 2 max) -an objective measure of cardiorespiratory function 2,3 -the maximum oxygen pulse, both absolute and relative to body weight 4,5 , the anaerobic threshold (AT) 6 , the ventilatory equivalent for carbon dioxide (VE/VCO2) 7 and the curve generated by the oxygen uptake efficiency slope (OUES) 8 . However, there are several limitations with the measurement of these variables, such as low reproducibility 9 , different manners of calculation or identification 10 , and the fact that to obtain most of these, it is necessary to perform a truly maximum test 11,12 , which usually depends the motivations of the evaluator and the evaluated.…”