| Work of breathing in dog during exercise. | |
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MedLine Citation:
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PMID: 7228759 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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In six dogs trained to wear a mask and to swallow an esophageal balloon, the dynamic work of breathing (Wdyn) was measured while the animals ran on a treadmill at different intensities (7-13 km.h-1,+10%). Wydn (kg.m.min-1) increased with ventilation (VE, 1.min-1) according to Wdyn = 0.308.10(-2) VE2 + 0.0098.10(-2).VE3. However, if the exercise was prolonged so that the body temperature rose above approximately 39 degrees C, Wdyn, for a given ventilation, decreased; and hence Wdyn = 0.253.10(-2).VE2 -- 0.0011.10(-2).VE3. Similar observations have been made on another dog heated from an external source. From this finding it seems that during exercise, when the temperature rises and the ventilation increases to dissipate heat, the airway size, at least in some portion of the respiratory tract, increases markedly and therefore the cost of breathing is greatly diminished. This mechanism would save oxygen for the exercising limb muscles when exercise has to be continued for an extended time. |
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Authors:
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F Saibene; P Mognoni; G Aguggini; M G Clement |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of applied physiology: respiratory, environmental and exercise physiology Volume: 50 ISSN: 0161-7567 ISO Abbreviation: J Appl Physiol Publication Date: 1981 May |
Date Detail:
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Created Date: 1981-07-09 Completed Date: 1981-07-09 Revised Date: 2009-11-03 |
Medline Journal Info:
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Nlm Unique ID: 7801242 Medline TA: J Appl Physiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1087-92 Citation Subset: IM; S |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Airway Resistance Animals Body Temperature Regulation Dogs Energy Metabolism Physical Exertion* Respiration Work of Breathing* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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