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Veterinary research communications1988; 12(2-3); 245-258; doi: 10.1007/BF00362807

Pulmonary mechanics during treadmill exercise in race ponies.

Abstract: 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.
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Publication Date: 1988-01-01 PubMed ID: 3188391DOI: 10.1007/BF00362807Google Scholar: Lookup
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Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

The research paper explores the changes in respiratory mechanics experienced by healthy race ponies during treadmill exercise. The study employs multiple variables like airflow, tidal volume, esophageal pressure, mask pressure and electrocardiogram readings among others to determine the exercise-induced variations.

Study Parameters and Tests

  • The research was conducted on 8 healthy race ponies, aged between 4.2 ± 1.4 years and weighing approximately 282 ± 11 kg.
  • Each pony underwent a treadmill exercise at an incline of 8.3 degrees, which consisted of sequential activities of 2-minute walking, 3-minute slow trotting and 3-minute fast trotting at different speeds.
  • The airflow, tidal volume, esophageal pressure, mask pressure and electrocardiogram readings were continuously recorded before, during and after the exercise.
  • The measurements were taken over three consecutive days and an average for each pony was calculated.

Results and Observations

  • Variables such as heart rate, minute volume, respiratory frequency and peak inspiratory and expiratory volume, mean inspiratory and expiratory volume, and changes in transpulmonary pressure (maxdPtp) were found to increase linearly with increasing the velocity of the exercise. The correlation was strong with an R2 value of 0.99.
  • Tidal volume and inspiratory time to total breathing time ratio showed a curvilinear relationship with the velocity, again reflecting a strong correlation (R2 = 0.99).
  • During rest to fast trot, the minute volume, maxdPtp, total pulmonary resistance and tidal volume increased by 6.7, 5.7, 1.5 and 1.6 times respectively.
  • At the end of the exercise, all values showed a significant decrease. However, after a recovery period of 5 minutes, the minute volume approximately doubled, while the tidal volume and maxdPtp remained unchanged. At the same time, the total pulmonary resistance was 30% lower than respective resting values.
  • The increase in minute volume due to exercise was achieved by an increase in respiratory frequency at both low and high-intensity work.

Conclusion

In conclusion, the paper provides detailed insight into exercise-induced changes in the ventilatory mechanics of race ponies. The results could be crucial in understanding the physiological changes that occur during intense physical activity in horses and help develop targeted training and recovery regimes.

Cite This Article

APA
Art T, Lekeux P. (1988). Pulmonary mechanics during treadmill exercise in race ponies. Vet Res Commun, 12(2-3), 245-258. https://doi.org/10.1007/BF00362807

Publication

Veterinary research communications
ISSN: 0165-7380
NlmUniqueID: 8100520
Country: Switzerland
Language: English
Volume: 12
Issue: 2-3
Pages: 245-258

Researcher Affiliations

Art, T
  • Laboratory for Cardio-Pulmonary Functional Investigation, Faculty of Veterinary Medicine, State University of Liege, Brussels, Belgium.
Lekeux, P

    MeSH Terms

    • Animals
    • Horses / physiology
    • Physical Exertion
    • Respiration
    • Respiratory Function Tests / veterinary
    • Rest

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