| Moderate and heavy oxygen uptake kinetics in postmenopausal women. | |
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MedLine Citation:
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PMID: 20029515 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The lack of estrogen in postmenopausal women not using hormone replacement therapy (HRT), compared with those using HRT, may reduce submaximal blood flow during exercise and result in an oxygen delivery limitation constraining oxygen uptake (VO(2) have been changed to V in the abstract, but will appear correctly in the body of the paper.) kinetics. The adaptation of pulmonary VO(2) (VO(2p)) during the transition to exercise in older women was examined in this study. Thirty-one healthy postmenopausal women (mean age, 61 +/- 6 years), 15 not using HRT and 16 using HRT, performed repeated exercise transitions (6 min) on a cycle, to work rates corresponding to 80% of estimated ventilatory threshold (moderate-intensity exercise) and to Delta50 (heavy-intensity exercise). There was no difference in moderate-intensity tauVO(2p) between non-HRT (40 +/- 9 s) and HRT (41 +/- 9 s) women. Similarly, there was no difference in heavy-intensity tauVO(2p) between non-HRT (44 +/- 8 s) and HRT (45 +/- 8 s) women. Thus, HRT did not affect the slowing of VO(2) kinetics of older women. |
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Authors:
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Liza Stathokostas; John M Kowalchuk; Robert J Petrella; Donald H Paterson |
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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: Applied physiology, nutrition, and metabolism = Physiologie appliqu?e, nutrition et m?tabolisme Volume: 34 ISSN: 1715-5312 ISO Abbreviation: Appl Physiol Nutr Metab Publication Date: 2009 Dec |
Date Detail:
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Created Date: 2009-12-23 Completed Date: 2010-04-15 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101264333 Medline TA: Appl Physiol Nutr Metab Country: Canada |
Other Details:
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Languages: eng Pagination: 1065-72 Citation Subset: IM |
Affiliation:
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School of Kinesiology, The University of Western Ontario, London, ON N6A 3K7, Canada. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adaptation, Physiological
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drug effects Aged Aging Bicycling Body Mass Index Estrogen Replacement Therapy* Exercise / physiology* Exercise Test / drug effects Female Heart Rate / drug effects Humans Kinetics Middle Aged Oxygen / physiology* Postmenopause / physiology* Pulmonary Ventilation Questionnaires |
| Chemical | |
Reg. No./Substance:
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7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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