Join Date: Aug 2010
Location: Southeastern PA
I ride English but I have the same problem with my horse, he is extremely narrow too, and if I let my leg hang, I would not touch his sides.
I feel like I am wrapping my leg around with my heels under me. I tend to sneak my legs a little further back than the ideal position so that I am connecting with the rounder part of him, but I am trying to stop that as I don't want to create a bad habit.
There's not much that you can do about it, but it does help to keep more of your weight in your heels.