| The influence of breathing mechanics on the development of the slow component of O2 uptake. | |
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MedLine Citation:
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PMID: 20619361 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We examined the influence of operational lung volumes and mean inspiratory flow on the amplitude of the slow component of O₂uptake (V(O)₂(SC) ) during constant-load cycling performed below and above the respiratory compensation threshold (RCT) in young (24±1yr), healthy individuals (n=10). Subjects demonstrated a significantly greater rise in expiratory reserve volume (ERV) and mean inspiratory flow over the V(O)₂(SC) period during exercise performed above compared with below the RCT (P<0.05). Inspiratory reserve volume (IRV) was, on average, smaller for trials performed above relative to below the RCT (P<0.05). The difference in the magnitudes of change in ERV and mean inspiratory flow, but not IRV, were positively correlated with the increase in V(O)₂(SC) amplitude between work rates (R(2)=0.86, P<0.01). These findings suggest that dynamic hyperinflation and mean inspiratory flow (by increasing inspiratory resistive work) contribute to the development of the V(O)₂(SC') , particularly when exercise is performed above the RCT. |
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Authors:
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Troy J Cross; Norman R Morris; Luke J Haseler; Donald A Schneider; Surendran Sabapathy |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-07-07 |
Journal Detail:
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Title: Respiratory physiology & neurobiology Volume: 173 ISSN: 1878-1519 ISO Abbreviation: Respir Physiol Neurobiol Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-09-13 Completed Date: 2010-12-28 Revised Date: 2011-01-13 |
Medline Journal Info:
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Nlm Unique ID: 101140022 Medline TA: Respir Physiol Neurobiol Country: Netherlands |
Other Details:
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Languages: eng Pagination: 125-31 Citation Subset: IM |
Copyright Information:
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Copyright 2010 Elsevier B.V. All rights reserved. |
Affiliation:
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School of Physiotherapy and Exercise Science, Gold Coast campus, Griffith University, Gold Coast, Queensland 4222, Australia. t.cross@griffith.edu.au |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Exercise / physiology Expiratory Reserve Volume / physiology Female Humans Lung Volume Measurements / methods Male Oxygen / metabolism* Respiratory Mechanics / physiology* Respiratory Muscles / metabolism* Rest / physiology Work of Breathing / physiology Young Adult |
| 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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