Anticipated Impacts on Veteran's Healthcare: Older Veterans with psychotic disorders face unique barriers to engagement in health-promoting activities, including prototypical features of psychosis (e.g., negative symptoms, medication side effects) and exacerbating features of the aging process (e.g., increased medical comorbidity, declines in musculoskeletal health). It is critical to develop strategies to empower this group to overcome these barriers and engage in health behaviors that can improve their functioning and quality of life. Peer interventions, or interventions delivered by individuals who are similar to a patient population on some characteristic such as age or diagnosis, effectively promote engagement in health behaviors in a range of populations. Despite the promise of peer support and urgent needs of older adults with psychosis, there are no well-specified peer support interventions that promote participation in health behaviors and are tailored to the needs of this group. The present study will yield a well-specified group-based peer coaching intervention, to be delivered by VA Peer Specialists (Veterans in recovery from mental illness), targeted to empower older Veterans with psychosis to overcome barriers, increase exercise/physical activity, and improve functioning.