The influence of the width of the saddle tree on the forces and the pressure distribution under the saddle.
Authors: Meschan Eva M, Peham Christian, Schobesberger Hermann, Licka Theresia F
Journal: Veterinary journal (London, England : 1997)
Summary
# Editorial Summary: Saddle Tree Width and Back Pressure Distribution Despite longstanding professional consensus that saddle fit matters, little empirical evidence had quantified how tree width actually affects load distribution on the equine back. Meschan and colleagues tested nineteen sound horses across walk and trot using a sensor mat beneath three saddles that differed only in tree width, collecting kinetic data across multiple motion cycles to establish baseline pressure profiles for each horse and identify their optimal-fit saddle. Narrow saddles created significantly elevated pressure in the rear third of the contact area—approximately 26% higher at walk and 25% higher at trot compared to optimal-fit saddles—whilst oversized saddles concentrated problematic pressure peaks in the middle section, with wide and very-wide trees generating 12% and 18% additional pressure respectively at walk, and 14% and 24% at trot. These findings demonstrate that poor tree fit concentrates forces into smaller bearing areas rather than distributing load evenly, creating the sustained pressure peaks associated with tissue damage and behaviour problems, which underscores the critical importance of precise saddle fitting as foundational to managing back health. For farriers, physiotherapists and veterinarians involved in case assessment, this work provides objective evidence that when musculoskeletal or performance issues emerge, saddle width should be systematically evaluated and adjusted as a primary intervention, rather than treated as a secondary consideration.
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Practical Takeaways
- •Saddle width has a measurable biomechanical impact on pressure distribution—ensure proper fit rather than assuming all saddles distribute load similarly
- •Both too-narrow and too-wide saddles create problematic pressure concentrations; fitting should prioritize the saddle that produces the lowest overall force for each individual horse
- •Use of pressure mapping or professional saddle fitting is justified to avoid concentrated load peaks that may contribute to back pain and performance issues
Key Findings
- •Narrow saddles produced significantly higher pressure in the caudal third of the back (0.63 N/cm² at walk, 1.08 N/cm² at trot) compared to optimally fitting saddles (0.50 N/cm² at walk, 0.86 N/cm² at trot)
- •Wide and very-wide saddles generated significantly higher pressure in the middle transversal third (1.52-1.57 N/cm² at trot) versus properly fitting saddles (1.27-1.33 N/cm² at trot)
- •Poorly fitting saddles concentrate load over a smaller contact area, creating potentially harmful pressure peaks compared to well-fitting saddles