I had my husband take some photos of me working my mare a few weeks ago, and I noticed that my heels were getting ahead of my hips. I had felt it too, but confirmed it photographically. I know I have a bad habit of getting a little behind the horse. However, my trainer hadn't gotten on to me about it, and I've actually noticed some dressage riders let their heels sneak a little forward of their hip position. Is that normal and/or acceptable? I feel more balanced when they are in line, but sometimes it's easier to control the horse when I sit a little behind, particularly if the horse is lazy or doesn't work off the seat well yet.
I can correct it when I think about, and I have been, but I'm curious now.