Relationship Between Saddle and Rider Kinematics, Horse Locomotion, and Thoracolumbar Pressures in Sound Horses
Authors: R. Mackechnie-Guire, Erik Mackechnie‐Guire, M. Fisher, H. Mathie, R. Bush, T. Pfau, R. Weller
Journal: Journal of Equine Veterinary Science
Summary
# Editorial Summary Saddle fit remains largely understudied despite widespread acceptance of its importance to equine health, prompting researchers to investigate how asymmetric saddle positioning directly influences biomechanics across the horse–saddle–rider system. Seven sound horses with saddle roll were assessed using motion capture, inertial measurement units, and pressure-mapping technology before and after saddle correction, with data collected at trot and canter. Correcting saddle roll produced measurable changes in limb mechanics: fetlock hyperextension increased in the outside front limb and inside hind limb during trot (P = .02 and P ≤ .05 respectively), whilst peak pressures beneath the saddle panel decreased on the inside surface in both gaits (P ≤ .05 in trot; P = .04 in canter). Beyond equine biomechanics, riders demonstrated significant postural adaptation, increasing thoracic side bend away from the direction of saddle roll—a compensatory mechanism likely aimed at maintaining balance and stability. These findings provide quantifiable evidence that asymmetric saddle positioning alters force distribution through the thoracolumbar region and disrupts normal limb mechanics, with riders actively adjusting their position to counteract these effects; practitioners should recognise that saddle roll not only compromises pressure distribution but also cascades into compensatory patterns affecting both horse movement and rider security.
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Practical Takeaways
- •Check for saddle roll at the start of every ride—even small asymmetries create measurable changes in pressure distribution and limb loading that may contribute to injury over time
- •When you notice a horse pulling to one rein or exhibiting uneven movement, saddle fit should be evaluated before assuming ridden technique or conformational issues are the cause
- •Correcting saddle roll improved pressure distribution and limb mechanics, suggesting that proper saddle fit is a preventive tool for soundness and performance
Key Findings
- •Saddle roll correction reduced peak pressures under the inside panel in trot (P ≤ .05) and canter (P = .04)
- •Saddle roll increased outside front fetlock hyperextension (P = .02) and inside hind fetlock hyperextension (P ≤ .05) in trot
- •Riders compensated for saddle roll by leaning toward the contralateral side (P = .02), indicating postural adjustment to maintain balance
- •Saddle asymmetry affects both horse limb mechanics and rider position, creating changes in force distribution through the kinetic chain