Exercise and Emotional Learning in Posttraumatic Stress Disorder

This trial is studying whether exercise can improve the brain's ability to process fear and fear extinction, and whether it reduces PTSD symptoms in adults who have experienced interpersonal violence (such as assault). It includes brain imaging (MRI) to track changes. **You may be eligible if:** - You are an adult (18+) with a diagnosis of PTSD related to interpersonal violence (e.g., physical or sexual assault) - You are physically able to exercise **You may NOT be eligible if:** - You have had severe substance use disorder in the past 3 months - You have had suicidal thoughts, psychotic episodes, or manic episodes in the past 3 months - You have significant developmental disabilities - You are currently taking benzodiazepines or stimulants daily and cannot stop for study sessions - You have recently changed psychiatric medications or started trauma-focused therapy (within 4 weeks) - You have a medical condition that prevents you from exercising - You have had a traumatic brain injury with loss of consciousness over 30 minutes - You have an MRI contraindication, a seizure disorder, or are pregnant Talk to your doctor to see if this trial is right for you.