Rider Position, Horse Back Movement Evaluated

A rising trot loads a horse’s back less than a sitting trot, producing less vertical force as measured through new biomechanical techniques, according to Dutch researchers.
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A rising trot is less loading to a horse's back than a sitting trot, producing less vertical force as measured through new biomechanical techniques, according to Dutch researchers.

From the kinematic data of 13 riders on two horses, scientists were able to determine that two force peaks are present during each trot stride. Calculations of the rider's center of mass acceleration as it varied during the stride were used to find the reaction force between the rider and the horse's back. Comparisons revealed that for both peaks, the force was significantly lower in the rising, or "posting," trot than in the sitting trot.

Earlier research by the same group compared the horse's back extension at the trot under a rising rider, a sitting rider, and an empty saddle. They observed in the rising trot, when the rider's seat is up, the horse's back is less extended than it is during a sitting trot. However, when the rider's seat is down in the rising trot, the horse's back extension is similar to the extension seen during the sitting trot.

Biomechanics research

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Passionate about horses and science from the time she was riding her first Shetland Pony in Texas, Christa Lesté-Lasserre writes about scientific research that contributes to a better understanding of all equids. After undergrad studies in science, journalism, and literature, she received a master’s degree in creative writing. Now based in France, she aims to present the most fascinating aspect of equine science: the story it creates. Follow Lesté-Lasserre on Twitter @christalestelas.

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