Originally Posted by love-a-hero
Eh... I don't really support the standing on the horses back.
I have to agree... at least with the placement of exactly WHERE you are standing. You are standing on the lumbar vertebrae, which have very long and very rigid processes that have relatively no give; ribs are attached to vertebrae with cartillage, which makes them relatively "sproingey" but the lumbar vertebrae have rigid processes, so right where you are standing is probably the worst spot to put pressure on a horse's back.
If you can get your hands on this book: "Tug Of War: Classical Versus Modern Dressage" I hightly recommend you flip through and read bits and pieces from the anatomy section... it's a great read.
Anyways, that was just more to educate than anything. I didn't realize that was the reason to not put pressure on that area of the back 'till I read that book.