Exercise economy does not change after acclimatization to moderate to very high altitude. - Lundby,C.; Calbet,J.AL.; Sander,M.; van Hall,G.; Mazzeo,R.S.; Stray-Gundersen,J.; Stager,J.M.; Chapman,R.F.; Saltin,B.; Levine,B.D. (Scand J Med Sci Sports, 2006)