So at my old barn, the trainer told me to "bend" over the fences, she basically wanted us to throw ourselves onto the horses neck. I have recently started jumping 3', and the horse I ride really jumps up, since he can only jump 3'. But I find I am over bending and throwing my hands up his neck...

Does anybody here have any advice for improving heel or leg position over fences? My leg slips back and my heels slip up whenever I jump, and I get the whole idea of just putting more weight in your heels and less in my hands, but are there any specific exercises to help with it? I would really...