Parameters of forelimb ground reaction force in 48 normal ponies.

The research article investigates the relationships between the body weight of horses, their trotting speed, ground reaction forces, the timing of activities during the stance phase and the total contact time with ground.

Objective and Methodology of the Research

• The study was designed to understand the correlation between several factors in normal ponies at a trot. The factors studied included vertical ground reaction forces (the force exhibited by the ground on the pony’s foot), bodyweight of the pony, timing of various events in the stance phase (the phase when the foot is in contact with the ground), and total contact time with ground.
• To gather data, recordings were made of 48 healthy ponies at trot.

Findings of the Study

• The research found a significant correlation between the mean vertical ground reaction forces and the pony’s bodyweight. This means, larger ponies experienced greater vertical ground reaction forces – the forces exerted back through the ponies’ feet from the ground.
• The results also showed an inverse correlation between the mean vertical ground reaction forces (corrected for bodyweight) and the total contact time. This suggests that a faster trot is associated with greater vertical ground reaction forces.
• Additionally, the study found a positive correlation between the bodyweight of the ponies and the contact time. This means that larger ponies had longer contact time with the ground, resulting in a slower stride frequency. Thus, as the size of the pony increases, the stride frequency decreases.
• The research also observed that the activities in the mid and late stance phases occur at consistent intervals of the total stance time. This indicates the progression of activities during ground contact is highly regular.
• A high degree of symmetry was found between ponies’ ground reaction forces and time parameters. This suggests that the force exerted on the ground and the timing of stance phase events are consistent among ponies of different sizes.

Significance of the Study

• The findings of this study are important in understanding the biomechanics of horse movement, particularly in relation to ground force reactions and stride frequency. This could be integral to assessment of equine health and performance, and potentially help in identifying any abnormalities in a horse’s gait. It could also enable the design of better footwear or surface materials to mitigate any deleterious effects of intensity and frequency of ground forces.