Kinematic Responses to Water Treadmill Exercise When Used Regularly within a Sport Horse Training Programme: A Longitudinal, Observational Study.
Authors: Nankervis Kathryn, Tranquille Carolyne, Tacey Jack, Deckers Isabeau, MacKechnie-Guire Russell, Walker Vicki, Hopkins Emily, Newton Richard, Murray Rachel
Journal: Animals : an open access journal from MDPI
Summary
# Water Treadmill Training Produces Measurable Kinetic Adaptations in Sport Horses Regular water treadmill work induces progressive changes in limb mechanics and spinal kinematics over a 40-week training period, according to this longitudinal observational study tracking 48 sport horses through standardised treadmill exercise tests at weeks 0, 20, and 40. Using three-dimensional videography, optical motion capture, and inertial sensors, researchers documented significant increases in both forelimb and hindlimb protraction alongside reduced retraction phases by week 40—kinetic shifts that reflect genuine neuromuscular adaptation rather than simple responses to water resistance alone. The thoracic spine also demonstrated greater flexion-extension and lateral bend ranges of movement over the study period, suggesting that regular submersion training promotes measurable changes in axial stability and mobility. Notably, training speed and water depth independently influenced these adaptations: faster speeds decreased forelimb protraction whilst increasing retraction, and higher session frequency altered the pattern of response differently than occasional use. For practitioners implementing water treadmill protocols, these findings indicate that session design—specifically the combination of depth, speed, and frequency—can be strategically manipulated to target specific training outcomes, making water work a genuinely customisable tool within broader conditioning programmes rather than a one-size-fits-all recovery modality.
Read the full abstract on PubMed
Practical Takeaways
- •Water treadmill sessions can be strategically designed to target specific training goals—vary depth and speed protocols to elicit desired kinematic changes in sport horses
- •Expect gradual kinematic adaptation over 20–40 weeks of regular water treadmill work; monitor changes in stride mechanics to assess training effectiveness
- •Session intensity (speed) and frequency matter: higher speeds produce different limb mechanics than slower work, so match protocol to conditioning phase and training objectives
Key Findings
- •Forelimb and hindlimb protraction increased significantly (p < 0.001) and retraction decreased (p < 0.001) over 40 weeks of regular water treadmill exercise
- •Caudal thoracic flexion-extension range of movement increased at week 40 compared to week 0 (p < 0.001), with lateral bend also increasing (p = 0.009)
- •Increased training speed was associated with decreased forelimb protraction (p = 0.008) and increased forelimb retraction (p = 0.021), demonstrating speed-dependent kinematic responses
- •Regular water treadmill exposure produces measurable kinematic adaptations distinct from acute effects of water depth, with session frequency and design (depth/speed) influencing the nature of adaptation