Preparing for and competing in the heat: the human perspective

Area of Science:

• Exercise physiology
• Comparative physiology
• Environmental stressors

Background:

• Exercising in hot environments poses significant physiological challenges for both humans and horses.
• Understanding these challenges is crucial for optimizing athletic performance and preventing heat-related illnesses.

Purpose of the Study:

• To review the challenges of exercising in heat for humans and horses.
• To compare human and equine physiological responses to exercise in hot conditions.
• To identify potential insights from human athletic strategies for equine exercise science.

Main Methods:

• Literature review of human and equine exercise physiology studies.
• Comparative analysis of thermoregulation and fluid/electrolyte balance.
• Discussion of heat acclimatization, training, and fluid replacement strategies.

Main Results:

• Similarities exist in human and equine physiological responses to heat stress during exercise.
• Horses possess unique physiological characteristics, including a lower surface area to body mass ratio and higher muscle metabolic capacity.
• These equine-specific factors may limit their ability to dissipate heat effectively under hot conditions.

Conclusions:

• Equine exercise science can benefit from human strategies for training, fluid replacement, and heat acclimatization.
• Key differences in equine physiology necessitate tailored approaches to managing heat stress in horses.
• Further research into equine thermoregulation is essential for enhancing equine athletic performance and welfare in hot climates.