Table 1: Simple bivariate Pearson correlations between demographic variables, cardiorespiratory fitness, and behavioral data. *Significant at ; **significant at .

VO2 Age Sex Education BMI Flanker  Con RT −.178* .283** .207** .009 −.036  Inc RT −.144 .162* .211** .042 −.056  Cost (RT) .020 −.179* .064 .023 −.034  Con Acc .199** −.277** −.133 .092 .060  Inc Acc .112 −.168* −.022 .052 .009  Cost (Acc) −.055 .099 .084 −.015 −.060 Task-switch  Repeat RT −.021 .006 .135 −.034 .005  Switch RT −.082 −.011 .173* −.105 .020  Cost (RT) −.071 −.004 .151 −.088 .025  Repeat Acc .174* −.224** .001 .040 .135  Switch Acc .231** −.270** −.032 .061 .130  Cost (Acc) .190* −.281** −.027 .022 .154