The main aim of this study was to evaluate the concordance between the indirect V ̇O2max value estimated by the distance achieved in the Yo-Yo intermittent recovery test level 1 (YYIR1) and the direct measurement during a treadmill protocol test (TP) in elite youth soccer players.Methods: Fourteen elite under 20 year's old soccer players from a first division soccer club were evaluated.Test were performed one week apart.In both tests V ̇O2, was measured with an ambulatory gas exchange measurement.YYIR1 estimated V ̇O2max was calculated using the equation described by Bangsbo et al. (2008) and in TP was calculated using American College of Sport Medicine equation.Results: Lin´s concordance correlation coefficient between direct V ̇O2max in TP and estimated V ̇O2max in YYIR1=0.271(poor concordance).Conclusions: The poor concordance between direct and indirect V ̇O2max measurements in TP and YYIR1, indicated that in an elite population both