Inclusion Criteria:  Current diagnosis of PTSD where the index traumatic event includes physical or sexual assault English speaking Medically healthy  Exclusion Criteria:  Any endorsed medical concerns related to physical activity (as probed in the phone screening questions regarding cardiovascular, pulmonary, or metabolic disease and as assessed via the Physical Activity Readiness Questionnaire (PAR-Q), which probes into participants' history of heart conditions, chest pain, dizziness, loss of consciousness, bone/joint problems, and medication history). Participants would not be excluded if they report this condition being "controlled" or "addressed" through medication or lifestyle change, such as regular exercise. Major medical disorders (such as cancer, AIDS) Psychotic disorders Intellectual disabilities Developmental disorders Active substance use disorders Pregnancy or probably pregnancy Body mass index greater than or equal to thirty Daily cannabis use History of any cardiac disease Inability to provide informed consent Physical disabilities that prohibit task performance (such as deafness or blindness) Self-reported history of loss of consciousness (greater than 30 minutes)