Figure 1 Changes in (A) duty cycle (T_I/T_TOT), (B) breathing frequency (F_B) and (C) Peak and (D) Tonic genioglossus muscle activity (EMG_GG) in the 60 s before reduction in continuous positive airway pressure (CPAP) (baseline) and on the first three and last three breaths of reduced CPAP in 10 patients with OSA and 15 non‐snoring subjects. The last three breaths are the average of the last three breaths before arousal or at the end of reduced CPAP if no arousal occurred. Mean (SE) values are presented. *p<0.05 vs baseline for both groups; #p<0.05 vs the first three breaths for both groups.