A Feasibility Study to Determine Whether Neuromuscular Adaptations to Equine Water Treadmill Exercise Can Be Detected Using Synchronous Surface Electromyography and Kinematic Data
Authors: L. St George, Kathryn Nankervis, V. Walker, Christy Maddock, A. Robinson, Jonathan Sinclair, Sarah J. Hobbs
Journal: Animals : an Open Access Journal from MDPI
Summary
# Editorial Summary Water treadmills are now commonplace in equine training and rehabilitation, yet the neuromuscular mechanisms driving the observed movement adaptations during this exercise remain unclear. St George and colleagues addressed this gap by developing and testing a synchronous measurement protocol combining surface electromyography (sEMG) and three-dimensional kinematics to capture hindlimb muscle activity (biceps femoris, gluteus medius, tensor fasciae latae), trunk muscle activation (longissimus dorsi), and thoracolumbar spine and pelvic movement in a single horse performing overground, dry treadmill, and water treadmill walking. Statistical parametric mapping revealed significant differences in muscle activation timing and amplitude alongside distinct kinematic adaptations across all three conditions, with the most pronounced neuromuscular changes occurring during water treadmill work compared to overground walking. Whilst this feasibility study included only one horse, it successfully demonstrates that integrated sEMG and motion capture technology can objectively quantify the physiological basis of water treadmill adaptation. Replication in larger cohorts will provide the evidence base needed to optimise conditioning and rehabilitation protocols—allowing farriers, veterinarians, and trainers to prescribe water treadmill exercise with genuine understanding of its biomechanical and neuromuscular effects rather than empirical assumptions alone.
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Practical Takeaways
- •Water treadmill exercise produces measurable changes in muscle activation patterns compared to ground exercise, providing scientific validation for its use in training and rehabilitation programmes.
- •This feasibility method combining EMG and motion capture can form the basis for larger studies to establish evidence-based guidelines for designing effective water treadmill conditioning and rehabilitation protocols.
- •Future research using this validated methodology should help trainers and veterinarians make informed decisions about when and how to use water treadmill training for specific adaptations.
Key Findings
- •Surface electromyography and kinematic analysis can be synchronously collected during water treadmill exercise to measure muscle activity and movement patterns.
- •Distinct, significant differences (p < 0.05) in hindlimb and epaxial muscle activation patterns were observed between overground, dry treadmill, and water treadmill conditions in this horse.
- •Adaptive muscle activity patterns were most pronounced during water treadmill exercise compared to overground walking in this horse.
- •Combined sEMG and 3D kinematic technology successfully quantified neuromuscular adaptations to water treadmill exercise in equine subjects.