Feasibility of Remote Tai Chi

Inclusion Criteria: * Veteran status as indicated by self-report * PTSD Case Definition. Veterans who meet Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-5) diagnostic criteria according to DSM-5 diagnostic algorithm for current PTSD as assessed on the Clinician-Administered PTSD Scale for DSM-5 (CAPS-5) will be eligible for the study. A diagnosis of current PTSD requires: a traumatic stressor (Criterion A) and the requisite number of symptoms at a severity level of 2 or higher in each symptom cluster. Each symptom is rated on a severity scale of 0 (no symptoms) to 4 (extreme), with 2 representing clinically significant and clearly present symptomatology. An individual must endorse at least one reexperiencing (Criterion B) symptom, at least one avoidance (Criterion C) symptom, at least two symptoms of negative alterations in cognition and mood (Criterion D), and at least two hyperarousal (Criterion E) symptoms. In addition, these symptoms must have been present for at least one month (Criterion F) and cause either clinically significant distress or functional impairment (Criterion G). * Chronic pain as indicated by complaints of musculoskeletal pain in one or more body regions for six months or more. * Willing to abstain from initiating evidence-based and mindfulness-based psychotherapy for PTSD, pain and related disorders until completion of the study (i.e., prolonged exposure, cognitive processing therapy, cognitive-behavioral treatment for insomnia or pain, acceptance and commitment therapy, dialectical behavior therapy, mindfulness-based stress reduction). Once enrolled, however, if other providers prescribe treatment or if participants require additional intervention (such as to manage a safety or substance abuse condition), treatment will be allowed, and appropriate referrals will be made. Individuals who are currently engaging in short-term (e.g., 12-week protocol) evidence-based treatment will not be eligible until treatment has ended. * Access to internet and home computer or tablet device that will allow telehealth delivery of intervention. * Available to attend either intervention group at the times they are scheduled. * Enrolled and eligible to receive care in Veterans Health Administration (VHA). The investigators will facilitate enrollment for Veterans not currently enrolled but wish to take part in the study. Exclusion Criteria: * Lacks the capacity to provide consent. * Diagnosed major medical disorder (e.g., neurol…