IJCS | Volume 31, Nº4, July / August 2018

328 Figure 1 - Diagram of dispersion between variables: a) cardiorespiratory optimal point (COP) and maximal oxygen consumption (VO 2 max); and b) COP and percentage of VO 2 max reached at the ventilatory threshold (VT). COP vs. VO 2 max COP vs. VT Goalkeeper Left/right- back Center- defender Midfielder Forwarder VO 2 max (mL.kg -1 .min -1 ) % of VO 2 max reached at the VT Cardiorespiratory optimal point de Souza e Silva et al. Cardiorespiratory optimal point in soccer players Int J Cardiovasc Sci. 2018;31(4)323-332 Original Article