Figure 3.

Correlation coefficients (with confidence intervals) for the relationships between physiological, perceptual and neuromuscular responses to the two first sets of HIT [oxygen uptake expressed as a percentage of maximal oxygen uptake (%$\dot{V}{\text{O}}_{\text{2}}$max), changes in vastus lateralis (ΔVL_Hbdiff) and biceps femoris (ΔBF_Hbdiff) oxygenation, changes in blood lactate (Δ[La]), changes in drop jump and counter movement jump height (ΔDJ and ΔCMJ), changes in muscle activity of the biceps femoris (ΔBF_RMS), medial gastrocnemius (ΔMG_RMS), and rate of perceived exertion (RPE)] and either locomotor profile [upper panel, maximal spring speed (MSS), the speed associated with maximal oxygen uptake (v$\dot{V}{\text{O}}_{\text{2}}$max), and the percentage of anaerobic reserve used (%ASR)] or measures of aerobic fitness and metabolic control [lower panel, maximal oxygen uptake ($\dot{V}{\text{O}}_{\text{2}}$max), time constants of the primary component of the pulmonary $\dot{V}{\text{O}}_{\text{2}}$ kinetics at exercise onset in the moderate and severe exercise intensity domain, $\dot{V}{O}_2{\tau }_{\text{on}}$MOD and $\dot{V}{O}_2{\tau }_{\text{on}}$SEV, respectively and the time constants of the primary component of the pulmonary $\dot{V}{\text{O}}_{\text{2}}$ kinetics after exercise performed in the severe intensity domain, $\dot{V}{O}_2{\tau }_{\text{off}}$SEV].