Figure 4.

Pattern of breathing in two group of subjects during the incremental test. The relationships between mean values of pulmonary ventilation ($\dot{V}$ _E) and tidal volume (V_T) for RMET (left panel) and CTRL (right panel) are presented, before and after the interventions. Iso‐respiratory frequency (fR) lines (dashed lines, departing from the origin) are also presented. The exponential functions fitting the experimental points are shown. See text for further details. RMET, respiratory muscle endurance training.