Maximizing Treatment Outcome and Examining Sleep in Post-traumatic Stress Disorder (PTSD)

Inclusion Criteria: * You have PTSD * You are between the age of 18 and 54 if female or between ages 18 and 44 if male. * You have written physician approval/medical clearance to participate in an exercise protocol. * Are currently taking no psychotropic medications or are able and willing to discontinue these medications prior to the first PE session. Exclusion Criteria: * You are currently participating in a structured exercise program * You have severe depression * You have any history of bipolar disorder, psychotic disorder, or obsessive compulsive disorder; * You have a diagnosis of eating disorder, or substance abuse or dependence (excluding nicotine) within the past six months * You have any history of a suicide attempt, or are at significant risk of self-harm or harm to others * You have ever been diagnosed with organic brain syndrome, mental retardation, or other cognitive dysfunction