Equine hoof slip distance during trot at training speed: comparison between kinematic and accelerometric measurement techniques.
Authors: Holden-Douilly, Pourcelot, Desquilbet, Falala, Crevier-Denoix, Chateau
Journal: Veterinary journal (London, England : 1997)
Summary
Hoof slip during the early stance phase represents a significant consideration for both performance optimisation and musculoskeletal soundness in trotting horses, yet standardised measurement methods have been lacking. Holden-Douilly and colleagues compared two techniques for quantifying longitudinal hoof displacement in French Trotters working at approximately 7 m/s on a firm wet sand track: accelerometry (sampling at 10 kHz from a device mounted on the right front hoof) and two-dimensional kinematic analysis using high-speed video (600 Hz) with direct linear transformation. Agreement between the two methods was middling for total slip distance and fairly good for hoof-flat slip specifically, with practical differences ranging from −0.5 to 2.1 cm across strides; notably, hoof rotation contributed less than 6% to accelerometric measurements, confirming that this variable need not substantially complicate interpretation. The accelerometric approach proved sufficiently robust and considerably simpler to deploy than marker-based kinematic analysis, making it a practical tool for practitioners seeking to quantify slip distances across different track surfaces and conditions. For farriers, coaches and veterinarians interested in assessing or modifying surface-related performance factors and injury risk, this work suggests that portable accelerometric measurement could become a useful diagnostic addition to training evaluations, particularly where detailed comparative data on track conditions is desired.
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Practical Takeaways
- •Accelerometers offer a simple, portable method for quantifying hoof slip on various track surfaces without requiring expensive high-speed camera equipment
- •Hoof slip measurements are relatively stable across different measurement techniques, supporting the reliability of either method for track surface comparison studies
- •This tool may help identify track conditions and farriery interventions that reduce longitudinal slide, potentially improving performance and reducing orthopaedic injury risk
Key Findings
- •Accelerometric and 2D-DLT kinematic methods showed 'middling/satisfactory' agreement for total slip measurement with differences ranging from -0.5 cm to 2.1 cm
- •Hoof rotation accounted for less than 6% of variation in accelerometric slip distance measurements
- •Accelerometric method provides a practical alternative to kinematic analysis for measuring hoof slip at moderate training speeds (7 m/s trot)