Breathing HeO2 increases ventilation but does not decrease the work of breathing during exercise.

Babb TG. , Am J Respir Crit Care Med , 2001; (163):1128-1134

Mechanism of reduced maximal expiratory flow with aging.

Babb TG, Rodarte JR. , J Appl Physiol , 2000; (89):505-511

Ventilatory response to exercise in aged runners breathing He-O2 or inspired CO2.

Babb TG, DS DeLorey, and BL Wyrick. , J Appl Physiol , 2003; (94):685-693

Mild obesity does not limit end-expiratory lung volume during cycling in young women.

Babb TG, DS DeLorey, BL Wyrick, PP Gardner. , Journal of Applied Physiology , 2002; (92):2483-2490

Hyperventilation with He-O2 breathing is not decreased by superimposed external resistance.

Babb TG, DS DeLorey. , Respiratory Physiology and Neurobiology , 2002; (133):139-151