Originally Posted by DunOverIt
Have you ever watched tie down roping? Or most reining? LOL
Some of those guys are not only tall, but not very small. And often on horses 15hh and under. I'm 6ft and not a stick, and I prefer my 14.3/15hh quarter horses. I'd rather not have to fly off a 17.3hh horse for tie down. ;)
That also depends on the discipline. In Jumping if your torso is too long then you can seriously throw off a horse's balance in the air if you make a tiny mistake. It's part of the reason why people tent to think English disciplines are so stuck on height.