Document Detail

Pulmonary mechanics during treadmill exercise in race ponies.
MedLine Citation:
PMID:  3188391     Owner:  NLM     Status:  MEDLINE    
Exercise-induced variations in their ventilatory mechanics were studied in 8 healthy ponies 4.2 +/- 1.4 years old and weighing 282 +/- 11 kg. Airflow (V), tidal volume (VT), esophageal pressure, mask pressure and electrocardiogram were simultaneously recorded before, during and after a treadmill (incline 8.3 degrees) exercise which consisted of 2 min walking (1.5 m.sec-1), 3 min slow trotting (3.0 m.sec-1) and 3 min fast trotting (3.5 m.sec-1). The results of three consecutive daily measurements were averaged for each pony. Heart rate, minute volume (Ve), respiratory frequency (f) and peak inspiratory and expiratory V, mean inspiratory and expiratory V, and peak to peak changes in transpulmonary pressure (maxdPtp) increased linearly and significantly with increasing velocity (v) (R2 = 0.99). Tidal volume and the inspiratory time to total breathing time ratio showed a curvilinar relation with v (R2 = 0.99). Minute volume, maxdPtp, total pulmonary resistance (RL) and VT increased from rest to fast trot 6.7, 5.7, 1.5 and 1.6 times respectively. When the ponies stopped all these values decreased significantly. After 5 min recovery, the Ve was approximately doubled, VT and max dPtp unchanged and RL 30% smaller than their respective resting values. The exercise-induced increase in Ve was achieved by an increase in f at both low and high intensity of work.
T Art; P Lekeux
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Veterinary research communications     Volume:  12     ISSN:  0165-7380     ISO Abbreviation:  Vet. Res. Commun.     Publication Date:  1988  
Date Detail:
Created Date:  1988-12-16     Completed Date:  1988-12-16     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8100520     Medline TA:  Vet Res Commun     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  245-58     Citation Subset:  IM; S    
Laboratory for Cardio-Pulmonary Functional Investigation, Faculty of Veterinary Medicine, State University of Liege, Brussels, Belgium.
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MeSH Terms
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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