Debbie, I think that you can do substitutions and still do it. It is my right shoulder that hurts. That is usually the one that hurts. Right hip, right shoulder, right side of my neck. That is why some of it I attribute to my body alignment. I have thought about a chiropractor but really I don't think insurance would pay and it scares me. No amount of stretching and flexibility seems to even it out. It could be worse though. I think the flexibility stuff has helped a lot.