Table 3. Correlation matrix between two conditions of slope for VO₂ max (mlO₂/kg^-1/min^-1), Heart Rate Max (HRMax, b/min^-1), Ventilatory Flow Rate (V_E, l/min^-1), Energy Cost of running (Cr, mlO₂/kg^-1/m^-1), Blood Lactate Accumulation (BLA, mmol/l^-1), Step frequency (SF, Hz), Step Length (SL, m) and velocity at VO₂max (vVO₂max, km/h^-1).

Cor. Coef.	VO2max	HRmax	VE	Cr	BLA	SF	SL	vVO2max
0% / 12.5%	.77**	.70*	.94***	.10	.78**	.73*	.62	.88***
0% / 25%	.88***	.64*	.90***	.09	.74*	.78*	.72*	.71*
12.5% / 25%	.84**	.79**	.85**	.78**	.52	.93***	.91***	.89***

*: p < 0.05**: p < 0.01***: p < 0.001