Gaits and rider motion
A horse's walk has four beats, trot has two, canter has three and gallop has four. Those rhythms move the saddle differently. The Riding X-Ray joins the horse's skeleton to a moving rider so that the footfalls, back motion and rider's pelvis can be followed together.
The working trot here takes 0.76 seconds per stride at 3.3 m/s. In the sitting-rider model, the stiff-pelvis setting loses seat contact for about 58% of that stride. The same setting at walk loses no seat contact. A posture change has different consequences in different gaits. The jumping sequence follows the horse and rider over a 1.10 m fence.
The anatomy is generated in code. Motion combines published measurements, fitted curves and stated estimates. It provides a visual explanation of riding biomechanics; the examples describe this model under its selected conditions.