The inside rein actually plays a very important part in turning. It is the single most uncomplicated aid we have that tells the horse "go left" or "go right". Of course, when we pull back on it, it says something different, flex, but when we open it, it becomes crystal clear what way we want the horse to go.
Part of every turning aid should be the "indication" with the inside rein.
As far as for the "outside leg", I prefer the term as my coach uses it "outside AID". It is not about putting your leg on, but creating a "tunnel" with your outside aids that the horse can not drift through. This tunnel is also partially created by the inside leg making the horse's body bend around the curve.
Really, it is all the aids that complete a turn, it is just decomposing which to teach first that is so confusing. Riding the horse is like putting him in a colander and slowly closing up all the holes one by one. If we were to all of a sudden put all the aids on for a perfect turn, he would feel like many holes had been closed up at once, and become confused or scared. We must teach him, aid by aid to turn until eventually we always have some degree of all aids applied on the horse.
Would also just like to ETA: I am not really allowed to touch my outside rein in a turn beyond keeping a contact. I am to use my outside aid to turn, not just pull on the rein and push the shoulder over. For a long while I could not turn my horse right to save my life and I was forbidden to touch my left rein going to the right. You must turn from the seat, from the legs and from the inside rein but only indicating with the inside rein.
Last edited by ~*~anebel~*~; 11-05-2009 at 02:44 PM.