B9 同一馬による初心者と上級者の違いについての一考察(技術)

抄録

We measured movement of horse's saddle back and displacement of various part of the rider. The jar (horse's up and down motion) during trotting was measured, relation to the rider's motion. An experienced rider is located on the perpendicular line of horse's gravity. But a beginner rider is sitting on the position behind horse's gravity. Therefore, the waist is in the back, and the body and the leg have inclined forward. As for the movement of rider's waist, a beginner rider are bigger than an experienced rider, and it has been understood that the phase shifts. The rider's wrist acts on horse's mouth. Horse's rhythm shifts by beginner's wrist and the displacement grows.