| Validity of oxygen uptake measurements during exercise under moderate hyperoxia. | |
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MedLine Citation:
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PMID: 9624658 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: The validity of oxygen uptake in hyperoxia (FIO2 = 30%) measured by an automated system (MedGraphics, CPX/D system) was assessed during the simulation of gas exchanges during exercise with a mechanical system and during submaximal exercise by human subjects. METHODS: The simulation system reproduced a stable and accurate VO2 for 30 min (sim-test). This trial was repeated nine times in normoxia and nine times in hyperoxia. Ten subjects also performed two submaximal exercises (55% of normoxic VO2max) on a cycle ergometer at the same absolute power in normoxia and in hyperoxia (ex-test). RESULTS: There was a significant downward drift of the oxygen fraction measurement in hyperoxia (< or = 0.10% for FIO2 and FEO2) during sim-test, but VO2 measurement remained stable in the two conditions. There was also a downward drift of the oxygen fraction measurement in the two conditions (< or = 0.07% for FIO2) during ex-test. VO2 was significantly higher in hyperoxia (+4.6%), and this result was confirmed using a modified Douglas bag method. CONCLUSIONS: These findings show that the CPX/D system is stable and valid for assessing VO2 in moderate hyperoxia. |
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Authors:
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F Prieur; T Busso; J Castells; R Bonnefoy; H Benoit; A Geyssant; C Denis |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Medicine and science in sports and exercise Volume: 30 ISSN: 0195-9131 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 1998 Jun |
Date Detail:
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Created Date: 1998-08-14 Completed Date: 1998-08-14 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 958-62 Citation Subset: IM; S |
Affiliation:
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Laboratoire de Physiologie-GIP Exercise, Université Jean Monnet, Faculté de Médecine Saint-Etienne, France. prieur@univ-st-etienne.fr |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Exercise / physiology* Humans Hyperoxia* Male Models, Biological Oxygen Consumption* Reproducibility of Results |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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