That the amount of impact put on the head plates of a saddle doubles for every foot a horse jumps?If you weigh 150 lbs and are jumping a four foot fence then 600 lbs of pressure is being put on the bars of the tree which ultimately reflects on the shoulders of your horse. The equation is 'your weight' times the 'number, in feet', you are jumping.
The placement of the saddles tree clearing the shoulders not only helps a horse rotate it’s shoulder, and use itself over jumps more effectively but also helps the rider to not jump ahead of the horses motion.
