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Thermoregulation. Base mechanisms and hyperthermia

A J Guthrie1, R J Lund

  • 1Equine Research Centre, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, Republic of South Africa.

The Veterinary Clinics of North America. Equine Practice
|April 30, 1998
PubMed
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High metabolic heat production during exercise in horses can lead to hyperthermia in hot, humid conditions. Early recognition and management are crucial for horse welfare during equine events.

Area of Science:

  • Equine physiology and exercise science
  • Thermoregulation and heat stress in animals

Background:

  • Horses generate significant metabolic heat during high-intensity exercise.
  • Evaporative heat loss via sweating is the primary thermoregulation mechanism in horses.
  • This mechanism is less effective under hot and humid environmental conditions.

Purpose of the Study:

  • To highlight the risks of hyperthermia in horses during exercise under thermally stressful conditions.
  • To emphasize the importance of early recognition and treatment of heat stress.
  • To underscore the necessity of careful planning and acclimatization for equine events.

Main Methods:

  • This study is a review of existing knowledge on equine thermoregulation and exercise physiology.
  • It synthesizes information on the physiological responses of horses to heat stress.

Related Experiment Videos

  • It discusses management strategies for preventing and treating heat-related illnesses.

    • Main Results:

    • Compromised evaporative heat loss in high humidity significantly increases hyperthermia risk.
    • Failure to manage heat stress can have severe consequences for horse health and performance.
    • Effective planning and acclimatization are vital for mitigating risks.

    Conclusions:

    • Prompt identification and treatment of heat stress are critical for equine welfare.
    • Strategic event management and conditioning programs are essential for horses competing in hot climates.
    • Further research into optimizing thermoregulation during equine exercise is warranted.