Body lean angle in sound dressage horses in-hand, on the lunge and ridden.
Authors: Greve Line, Dyson Sue
Journal: Veterinary journal (London, England : 1997)
Summary
# Editorial Summary: Body Lean Angle in Sound Dressage Horses Greve and Dyson investigated how horses naturally lean their bodies when moving on curves, comparing actual lean angles (measured via inertial measurement units placed at the sacrum) against theoretical predictions based on velocity and turning radius. Thirteen sound dressage horses were assessed across multiple scenarios: straight lines, lunging and ridden work on both reins, at both trot and canter. Younger horses (≤6 years) demonstrated significantly greater lean than predicted by physics alone (2.9° excess), whilst mature horses (≥7 years) showed minimal deviation from predicted values; notably, horses performing at high ridden work quality (FEI grade ≥7) leant less than predicted, suggesting improved biomechanical efficiency through training. No significant differences emerged between gaits or reins in sound horses, though the authors highlight that asymmetrical lean between reins may warrant investigation as a potential lameness indicator. For practitioners, this work suggests that excessive or unequal body lean during circles could signal either developmental immaturity, poor training/ridden work quality, or subclinical pathology, making it a potentially useful screening parameter during in-hand and ridden assessments.
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Practical Takeaways
- •Asymmetrical body lean between reins during work may serve as a useful indicator for early lameness detection in dressage horses, warranting further investigation
- •Younger horses naturally lean more into turns than biomechanics predict; this is normal and improves with age and training quality
- •Better ridden work quality (FEI scores ≥7) correlates with more efficient body lean during turns, suggesting improved balance and training
Key Findings
- •Younger horses (≤6 years) leaned 2.9° more than predicted during turns, while older horses (≥7 years) leaned only 0.4° more than predicted (P=0.01)
- •Horses with ridden work quality scores ≥7 leaned 1.1° less than predicted, compared to horses scoring ≤6 which leaned 2.4° more than predicted (P=0.02)
- •No significant differences in body lean angle between trot and canter on lunge or ridden work (P=0.3)
- •No significant differences in body lean angle between left and right reins (P=0.2); asymmetry between reins may indicate abnormality or lameness