Mechanical Effect of Performance Pressure Boots on Cadaveric Equine Hindlimb Fetlock Biomechanics.
Authors: Symons Jennifer
Journal: Animals : an open access journal from MDPI
Summary
# Editorial Summary: Mechanical Effect of Performance Pressure Boots on Cadaveric Equine Hindlimb Fetlock Biomechanics Pressure boots marketed for showjumpers are typically justified on the basis of enhancing proprioception and encouraging better hind limb mechanics over fences, yet little evidence exists for their actual mechanical effects on joint biomechanics. Symons investigated this question using cadaveric hindlimbs (n=6) subjected to cyclical axial compression (~3300 N) whilst measuring fetlock angles via bone-fixed markers, comparing limb loading and fetlock stiffness with and without pressure boots applied. The boots significantly increased fetlock joint stiffness by 3 N/degree (p=0.001) and altered loading patterns in both unloaded (6 N difference, p=0.05) and loaded states (25 N difference, p=0.002). Although these biomechanical changes may seem modest in the laboratory setting, the author suggests that load alterations become more pronounced at the greater fetlock angles characteristic of cantering and jumping, potentially increasing tensile strain on palmar tendons and ligaments. For equine professionals, these findings raise important questions about whether the purported benefits of pressure boots justify potential welfare concerns related to altered biomechanics and increased injury risk, warranting closer scrutiny of their routine use in performance horses.
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Practical Takeaways
- •Pressure boots mechanically increase fetlock stiffness and load on palmar soft tissues; practitioners should counsel clients that claims of enhanced proprioception may mask potential injury risk
- •Increased joint stiffness with boots may have greater negative effects during high-load activities (canter, jumping) when fetlock angles increase
- •Consider musculoskeletal injury patterns in horses regularly wearing pressure boots, particularly suspensory ligament and deep digital flexor tendon lesions
Key Findings
- •Pressure boots increased measured loads by 6 N in unloaded state (p=0.05) and 25 N in loaded state (p=0.002)
- •Pressure boots increased average fetlock joint stiffness by 3 N/degree (p=0.001)
- •Greater fetlock stiffness with boots may increase tensile loading of palmar tendons and ligaments during jumping
- •Mechanical effects of pressure boots may increase musculoskeletal injury risk contrary to manufacturer claims