Document Detail


Work of breathing in dog during exercise.
MedLine Citation:
PMID:  7228759     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
F Saibene; P Mognoni; G Aguggini; M G Clement
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of applied physiology: respiratory, environmental and exercise physiology     Volume:  50     ISSN:  0161-7567     ISO Abbreviation:  J Appl Physiol Respir Environ Exerc Physiol     Publication Date:  1981 May 
Date Detail:
Created Date:  1981-07-09     Completed Date:  1981-07-09     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  7801242     Medline TA:  J Appl Physiol Respir Environ Exerc Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1087-92     Citation Subset:  IM; S    
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MeSH Terms
Descriptor/Qualifier:
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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