Effect of hyperoxia on maximal oxygen uptake, blood acid-base balance, andlimitations to exercise tolerance

Astorino, Todd & Robergs, Robert A. (2003) Effect of hyperoxia on maximal oxygen uptake, blood acid-base balance, andlimitations to exercise tolerance. Journal of Exercise Physiology Online, 6(2), pp. 8-20.

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Hyperoxia, or an increase in inspired oxygen concentration, has been used by scientists to examine exercise metabolism and physical work capacity. It is apparent that hyperoxia increases VO2max and exercise tolerance due to an increase in O2 supply to contracting muscle. Furthermore, hyperoxia increases PaO2, which may promote an enhanced diffusion of O2 in skeletal muscle. Compared to normoxia, hyperoxia may reduce PCr degradation during the metabolic transient, attenuating the magnitude of cellular disturbance characteristic of near-maximal to maximal exercise. These aforementioned increases in exercise tolerance during hyperoxia are not due to alterations in ventilation, lactate (La-), or acid/base balance in hyperoxia, as previous data report no change in these parameters compared to normoxia. In addition, it is recommended researchers take special precautions to ensure the accuracy of gas exchange data in hyperoxia.

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ID Code: 96874
Item Type: Journal Article
Refereed: Yes
Keywords: creatine phosphate; lactic acid; oxygen; phosphate, acid base balance; aerobic metabolism; blood gas; central nervous system function; controlled study; exercise tolerance; gas exchange; human; human experiment; hyperoxia; lactate blood level; lung ventilation; muscle contraction; nonhuman; normal human; n
ISSN: 1097-9751
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Schools > School of Exercise & Nutrition Sciences
Copyright Owner: Copyright 2003 American Society of Exercise Physiologists
Deposited On: 04 Aug 2016 05:25
Last Modified: 04 Aug 2016 05:28

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