This study will ascertain the feasibility and effect of Eischens yoga interventions on radiationrelated fatigue, sexual dysfunction and urinary incontinence in stage I /II prostate cancer patients undergoing radiotherapy with photons and/or protons without prostatectomy. Subjects must be smoke free and have not taken regular yoga classes 6 months prior to enrollment. Subjects will participate in twice weekly yoga sessions for 8 weeks and complete 4 quality of life forms 5 times during study.