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Hyperthermia in running sled dogs

C J Phillips, R P Coppinger, D S Schimel

    Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology
    |July 1, 1981
    PubMed
    Summary
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    Training significantly reduces hyperthermia in sled dogs during strenuous exercise. Rectal temperature increases with ambient temperature, not speed or distance, indicating environmental factors are key for sled dog heat management.

    Area of Science:

    • Exercise Physiology
    • Animal Thermoregulation

    Background:

    • Sled dogs experience significant rectal temperature increases during high-speed exercise.
    • Understanding factors influencing canine hyperthermia is crucial for performance and welfare.

    Purpose of the Study:

    • To investigate hyperthermia in sled dogs during prolonged, high-speed exercise.
    • To identify correlations between rectal temperature changes and environmental/physiological factors.

    Main Methods:

    • Monitoring rectal temperature in 22 sled dogs during simulated races.
    • Analyzing data in relation to ambient temperature, speed, distance, and training status.

    Main Results:

    • Rectal temperature increased significantly in the initial 15-20 minutes of exercise, then stabilized.

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  • Hyperthermia correlated directly with ambient temperature, but not with speed or distance.
  • Training significantly reduced the degree of exercise-induced hyperthermia.

    • Conclusions:

    • Ambient temperature is a primary driver of hyperthermia in sled dogs during exercise.
    • Training is an effective strategy to mitigate heat stress in working sled dogs.
    • Individual physiological and genetic factors do not significantly explain variations in hyperthermia among dogs.