Understanding the Biomechanics of Lameness

Equine locomotion involves consistent patterns of limb movements that change in predictable ways when the horse is lame. Learn what to watch for.
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Equine locomotion seems like a sophisticated thing. All those delicate bones, joints, tendons, and muscles must move in tandem to propel the horse's large body forward at varying speeds.

But in truth, it's really quite simple and predictable—so much so that veterinarians can evaluate a horse's movement pattern and detect abnormalities related to pain or dysfunction.

At the American Association of Equine Practitioners' Focus on the Sport Horse program, held July 20-22 in Louisville, Kentucky, Hilary Clayton, BVMS, PhD, MRCVS, Dipl. ACVSMR, McPhail Dressage Chair Emerita at Michigan State University and president of Sport Horse Science, in Mason, Michigan, discussed equine locomotion and how the horse's gaits adapt to lameness. She shared her knowledge about the horse's stride and assessing it for lameness; but first, she gave the veterinary audience a brief physics refresher.

The Forces and Torque on the Equine Limb

"For every force there is an equal and opposite force," Isaac Newton stated in his Third Law

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Alexandra Beckstett, a native of Houston, Texas, is a lifelong horse owner who has shown successfully on the national hunter/jumper circuit and dabbled in hunter breeding. After graduating from Duke University, she joined Blood-Horse Publications as assistant editor of its book division, Eclipse Press, before joining The Horse. She was the managing editor of The Horse for nearly 14 years and is now editorial director of EquiManagement and My New Horse, sister publications of The Horse.

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