Absolute value of respiratory parameters throughout the progressive respiratory protocol.

<p>Scatter plot of the absolute peak inspiratory mouth pressure values (IP_peak), the amplitude of the mechanical activation of the inspiratory muscles estimated by multistate Lempel–Ziv (MMG-MLZ) (graphs <b>A</b> and <b>B</b>) and the root mean square (MMG-RMS) (graphs <b>C</b> and <b>D</b>) in a very severe COPD patient (graphs <b>A</b> and <b>C</b>) and a healthy subject (graphs <b>B</b> and <b>D</b>), throughout the progressive respiratory protocol. All <i>r</i> values are significant at p<0.001.