I rode regularly (3 times a week) for a few years about 10 years ago and am now getting back to it. I've had a child in the meantime, which has given me a slightly different body, plus I have scoliosis and the curvature in my spine (S shaped, puts my hips and my shoulders at different levels) has increased. I have all the problems I've always had with my riding, plus some new weirdness, which is that I always post with the horse's right shoulder, regardless of what direction we're going in. When I check myself, and sit or two point a beat to switch to posting off the other side, the gait just feels soft and mushy to me and I end up inadvertently switching back to the other side which pushes me up to post. Note that this happens with three different horses...it's all me. What the hell?