My wonderful wife has had Rhuematoid Arthritis since she was 13 years old. She is now 36 and is interested in triing to preserve and build what muscle she has. We own the Bow flex pro system and I feel this would be the best machine for her to work with. Is there any advise you may have on certain exercises. He flexability is limited and she gets disgusted with diets that seem to take for ever for her to lose wieght. We both believe that building a little muscle would increase her metabolism and help increase her wieght loss goals. Her goal is 20-30 pounds of wieght. But more importantly gain some muscle. I appriciate any advice for us. Thanks you, Ron & Dana