| Respiratory and leg muscles perceived exertion during exercise at altitude. | |
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MedLine Citation:
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PMID: 21435397 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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We compared the rate of perceived exertion for respiratory (RPE,resp) and leg (RPE,legs) muscles, using a 10-point Borg scale, to their specific power outputs in 10 healthy male subjects during incremental cycle exercise at sea level (SL) and high altitude (HA, 4,559 meters). Respiratory power output was calculated from breath-by-breath esophageal pressure and chest wall volume changes. At HA ventilation was increased at any leg power output by ∼54%. However, for any given ventilation, breathing pattern was unchanged in terms of tidal volume, respiratory rate and operational volumes of the different chest wall compartments. RPE,resp scaled uniquely with total respiratory power output, irrespectively of SL or HA, while RPE,legs for any leg power output was exacerbated at HA. With increasing respective power outputs, the rate of change of RPE,resp exponentially decreased, while that of RPE,legs increased. We conclude that RPE,resp uniquely relates to respiratory power output, while RPE,legs varies depending on muscle metabolic conditions. |
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Authors:
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A Aliverti; B Kayser; A Lo Mauro; M Quaranta; P Pompilio; R L Dellacà; J Ora; L Biasco; L Cavalleri; L Pomidori; A Cogo; R Pellegrino; G Miserocchi |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-21 |
Journal Detail:
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Title: Respiratory physiology & neurobiology Volume: - ISSN: 1878-1519 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-25 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101140022 Medline TA: Respir Physiol Neurobiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011. Published by Elsevier B.V. |
Affiliation:
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TBM Lab, Dipartimento di Bioingegneria, Politecnico di Milano, Milano, Italy. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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