I had a back problem about tne years ago that was directly attibuted to sewing in a wooden chair and using only my right foot. The doctor I was seeing suggested trying to sew with my left foot but cautioned that I probably would not be able to since I had sewn with my right foot for so long. I tried it and was able to sew lefty. The doctor was amazed that it was such a smooth transition. I told him it depended on HOW BADLY I wanted to sew. I think the same is with anyone, if you want to sew badly enough, you'll find a way.