The primary objective of the current study is to establish the safety and acceptability of Mindful Yoga Therapy as an adjunctive treatment for posttraumatic stress disorder (PTSD) among Operation Enduring Freedom/Operation Iraqi Freedom/Operation New Dawn (OEF/OIF/OND) Veterans. The current study also seeks to establish preliminary efficacy of Mindful Yoga Therapy for reduction of symptoms of PTSD and explore heart rate variability as a mechanism of therapeutic action.