Dear Bob, I did not know I was going to be so verbal, but here goes. My advice would be to see an orthopedic specialist who can evaluate what is happening. I was not on Nautilus, but from refinishing cabinets, I suspect, I developed severe pain in my left shoulder. Thinking it was a pd symptom, I ignored it until I could not sleep at night. Then I remembered from my past checkered medical history that I had bursitis twice previously in that shoulder. By the time I got to the ortho and physical therapist, the shoulder, shoulder blade, and rib cage were involved. Physical therapy for six months brought me a long way; I also had two injections of cortisone. The therapist told me that tendonitis probably was the initial set-off. She was very insightful and custom designed a new work-out for me every time I went. What a gem! The therapy included heat packs and ultrasound. It was very painful (thought I would warn you.) She also taught me to distinguish "good" pain and "bad". At the end, she told me that she never thought I would make it because of the pd. I continue with daily range of motion and the workout for ten minutes a day on the exercycle. If I go overboard on the cycle, the pain returns and then I back off a bit. I worked out when under therapy with the pulley over the door and various resistance exercises with the colored rubber strips, etc. Moderation in all things! Best wishes, Lucile RWright229