I do have a very bad problem with pain in the neck and shoulders and back when I sew but, I have those same problems whever I sit for longer than a few minutes. I have what they call stage 4 arthritis in all my joints and yesterday was told I have figromayalga on top of that. I put small blocks of wood under the back legs of my table and that seems to help. Be sure your foot peddle is in a position that does not cause any strain anywhere. Move often.