A relationship between gait and breakdown in the horse.

Area of Science:

• Biomechanics
• Equine locomotion
• Animal performance analysis

Background:

• Running biomechanics in horses is crucial for performance and soundness.
• Previous models assumed swing time is speed-independent, with racehorses and trotters exhibiting similar swing times.

Purpose of the Study:

• To present a biomechanical model of horse running.
• To analyze the relationship between speed, swing time, stance phase, and airborne phase.
• To determine safe running speeds based on gait parameters.

Main Methods:

• Developed a biomechanical model of equine running.
• Utilized stride-by-stride analysis to examine horse motion.
• Calculated safe running speeds based on leg contact preparation time.

Main Results:

• As speed increases, the stance phase shortens, necessitating increased extension or airborne phase.
• Safe running speed is highly sensitive to the overlap time in the gait.
• Leg overlap significantly influences both performance potential and soundness.

Conclusions:

• The overlap time in equine gait is a critical factor for determining safe running speeds.
• Understanding gait dynamics, particularly leg overlap, is essential for optimizing horse performance and preventing injuries.