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Related Experiment Videos

Hemorheologic alterations induced by incremental treadmill exercise in thoroughbreds

R J Geor1, D J Weiss, C M Smith

  • 1Department of Clinical and Population Sciences, College of Veterinary Medicine, School of Medicine, University of Minnesota, St. Paul 55108.

American Journal of Veterinary Research
|June 1, 1994
PubMed
Summary

Treadmill exercise significantly alters blood viscosity and red blood cell (RBC) function in Thoroughbreds. These hemorheologic changes highlight the complex physiological responses to intense physical activity in horses.

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Area of Science:

  • Equine Physiology
  • Sports Medicine
  • Hemodynamics

Background:

  • Exercise induces significant physiological stress in athletic horses.
  • Understanding hemorheologic changes during exercise is crucial for performance and health.
  • Thoroughbreds are prone to exercise-induced hemorheologic alterations.

Purpose of the Study:

  • To investigate hemorheologic alterations in Thoroughbreds during incremental treadmill exercise.
  • To assess the impact of exercise intensity on blood viscosity, red blood cell (RBC) properties, and electrolyte concentrations.

Main Methods:

  • Five Thoroughbred horses performed incremental treadmill exercise.
  • Measurements included blood viscosity, packed cell volume (PCV), RBC filterability, density, shape, and electrolyte concentrations.

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  • Samples were collected at rest, during exercise (9 and 13 m/s), and post-exercise.

    • Main Results:

    • Exercise significantly increased PCV, blood viscosity, and plasma total solids.
    • RBC filterability decreased significantly at higher exercise speeds.
    • RBCs became less dense and increased in mean cell volume during exercise.
    • Electrolyte concentrations (serum and RBC) increased significantly during exercise.

    Conclusions:

    • Exercise induces consistent hemorheologic alterations in Thoroughbreds.
    • Increased blood viscosity and decreased RBC filterability are key findings.
    • Multiple hemorheologic parameters are necessary to fully characterize exercise-induced changes in horses.