You can be sitting on the bench in the middle of along with not feel any hassle.
A massage therapist can massage the muscles and joints that are affected by your arthritis. You don't need rock hard abs, but the better you conditioned the greater overall back support you'll get. https://WWW.Evernote.com/shard/s643/sh/9048ab13-d5a8-3cc1-cb82-eca8a3642c5c/yL6QS0YsavxciLMlPFVHzN9FyeudwAcFj6vOOGr3dD8TB3_xW2gAith9sg