Exercise-induced arterial hypoxemia in healthy young women, the effect of altering breathing mechanics with heliox inspiration P. B. Dominelli, G.E. Foster, G.S. Dominelli, W.R. Henderson, M.S. Koehle, D.C. McKenzie and A. W. Sheel, School of Kinesiology, University of British Columbia, Vancouver, BC, Canada, V6T 1Z3; Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada, V6T 1Z3