ABSTRACT.The changes in minute ventilation (&OV0312;E), tidal volume (VT), and breathing frequency (f) were studied in eleven subjects during and immediately after exercise of various intensity. The intensity of exercise affected the offset responses. Peak expiratory flow and f consistently decreased immediately following exercise. However, VTdid not immediately change following light and moderate work loads and increased following work loads of heavy and severe intensity. The changes in endtidal CO2approximately parallelled those of VT. Since f and VTchange reciprocally immediately following high levels of work, it appears that the mechanisms of control of these parameters differ. This mixed offset response results in a small decrease in VEimmediately following exercise and suggests that the neurogenic stimulus to ventilation which is removed by the cessation of motion, plays a relatively minor role, quantitatively, in the exercise hyperpnea under these conditions and primarily by affecting f.