Document Detail

Effect of environmental temperature and relative humidity on breathing pattern and heart rate in ponies during and after standardised exercise.
MedLine Citation:
PMID:  3195005     Owner:  NLM     Status:  MEDLINE    
A preliminary study attempted to assess the influence of atmospheric conditions on the breathing pattern of ponies. The respiratory airflow, tidal volume, breathing frequency, minute volume, total pulmonary resistance and heart rate of five ponies (257 +/- 9 kg and three to five years old) were measured by a standardised procedure. Data were collected at rest, during a nine minute period of treadmill exercise and during a five minute recovery period. The ambient temperature (degrees C) and relative humidity (%) were recorded at the time of each investigation and the respiratory parameters were divided into two groups according to whether the sum of these measurements was less than 85, ie, the conditions were cold and dry or greater than 85, ie, the conditions were relatively hot and humid. Data for each pony in both conditions were compared. The ambient temperature and relative humidity did not significantly modify the breathing pattern of the ponies either at rest or during exercise. On the other hand the frequency of breathing was significantly higher and the tidal volume and total pulmonary resistance were significantly lower during recovery in hot and humid conditions than in cold and dry conditions, while the minute volume remained unchanged. It was concluded that, during recovery, environmental conditions may modify the breathing pattern of horses. This suggests that in hot and humid weather conditions the respiratory rate may be an unreliable measure of the fitness of a horse and, consequently, that a more complete pulmonary investigation should be undertaken for an assessment of fitness.
T Art; P Lekeux
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Veterinary record     Volume:  123     ISSN:  0042-4900     ISO Abbreviation:  Vet. Rec.     Publication Date:  1988 Sep 
Date Detail:
Created Date:  1988-12-23     Completed Date:  1988-12-23     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0031164     Medline TA:  Vet Rec     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  295-9     Citation Subset:  IM; S    
Faculté de Médécine Vétérinaire, University of Liege, Brussels, Belgium.
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MeSH Terms
Heart Rate*
Horses / physiology*
Physical Exertion*
Respiratory Function Tests / veterinary

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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