InMotion - Telehealth Delivered Exercise Promotion to Treat Major Depression After TBI

The purpose of this randomized controlled trial is to evaluate whether the InMotion intervention, delivered via telehealth (using a HIPAA-compliant video platform or phone), which uses evidence-based behavioral and motivational counseling to increase daily physical activity, is an effective treatment for Major Depressive Disorder (MDD) for people who are at least one year out from sustaining a traumatic brain injury (TBI). The first aim is to compare the efficacy of the InMotion intervention to the waitlist control (WLC) condition on measures of depression severity and associated conditions in under-active adults with TBI and MDD. For the second aim the investigators plan to identify possible moderators of exercise treatment effects. The third aim will examine possible mediators of treatment outcome. In addition, the weekly dose of exercise, the extent to which exercise generates positive affect, and engagement in enjoyable or meaningful aspects of life will be explored.