Figure 4.

Patients were instructed to breathe from their residual volume to their total lung capacity for assessment of their maximal voluntary muscle activation. The surface EMG signal of the diaphragm was detected using a pair of Ag/AgCl electrodes (Kendall™ 100 Foam Electrodes, Conductive Adhesive Hydrogel 31118733, Mansfield, MA, USA). Comparison of (A) diaphragm activation based on the %EMG_max and (B) f_m during inspiratory muscle training (IMT) breaths at baseline and weekly over the course of concurrent chemoradiation therapy (CCRT) in the control (-♦-) and training groups (--■--).