Okay, so I have been on Accutane (or Roaccutane as I am familiar with it) for exactly a month now. For the past week or so, I have had a really stiff back and shoulders. I do spinning, horse riding and pilates. Thanks for the tips on alternative exercise, but if it's difficult to stop the more intense exercise if I'm used to it. I know I should probably. It's just so frustrating! Believe it or not pilates is the most painful. I ache when I have to hold poses for too long. What are the adverse effects of just puching through the pain?