It is unknown whether neural inhibition of respiratory drive occurs during exhaustive exercise.We hypothesised that neural inhibition did occur;to test the hypothesis we measured diaphragm EMG from a maximal inspiratory capacity maneuver (EMGdi-IC) at rest and during exercise.EMGdi-IC was measured before and after the plateau phase of the diaphragm EMG in eleven healthy adults undertaking exercise at 60% and 80% of maximal workload achieved from incremental exercise.