All participants will have physical assessments of disease activity and damage performed by their physician at study entry and at study completion. Questionnaires addressing psychological and physical distress will be administered at entry and at the completion of the study. Participants in the yoga group will be asked to attend 60-minute yoga classes twice weekly for a period of eight weeks. The classes will be held in a yoga studio and led by a certified Iyengar yoga instructor. The program consists of a series of poses. Focusing on correct body alignment, the instructor will lead participants into poses that concentrate on relaxing muscle to release physical tension and create mental relaxation. Props (blankets, bolsters, blocks) will be used to attain poses with ease. All poses will be taught with the intention that they will be easily replicated at home.