Figure 3. Comparison of the relative VO2 values (exercise VO2 – rest VO2) during incremental treadmill exercise with +15% incline (CON +15%; open bar) and -30% incline (ECC -30%; grey bar) (A) or -15% incline (ECC -15%; black bar) (B) at the three selected speeds (15, 25 and 35 cm/sec). No significant difference was observed between the relative CON+15% and ECC-30% VO2 values in the three situations (A). Conversely, the relative ECC -15% VO2 values were significantly lower than the CON +15% VO2 values (group effect: p < 0.01; condition effect: p < 0.001); the CON VO2/ECC VO2ratios are between 2.05 and 1.65.