The PARCS Pilot Study Randomized Controlled Trial: Feasibility and Acceptability of a Park-Based Exercise Program Led by Peer Specialists for Peers with Serious Mental Illness.

Adults with serious mental illness (SMI) die decades early, mostly from heart disease. Few park-based exercise interventions have been tested, none focused on SMI. The study (NCT05293587) tested a 6-week exercise intervention (INT; 45 min park-based exercise led by a certified peer specialist (CPS) 3 days/week) vs. waitlist control (WAIT), as part of an existing peer support program for adults with SMI in Georgia. Eighteen peers (44±15 yrs, 28% female, 72% Black, 17% Hispanic, 33% with diabetes) were randomized (6 INT, 12 WAIT). One CPS was trained to lead exercise sessions, supported by a certified fitness instructor at each session. 10 sessions were conducted in each cohort, up to 2 per week. Transportation was provided as part of peer services. INT peers attended 69±22% of sessions. INT peers attended 100% of sessions when they were present at the peer support program, except for one peer on 2 occasions (improper footwear, medication side effect). Peers were highly satisfied with the park sessions and highly motivated to participate. The CPS who led the sessions expressed satisfaction. While not significant, compared to baseline, INT peers had slightly improved fitness, hemodynamics, and depression symptoms, and social support for exercise at post. The park-based CPS-led exercise program for peers with SMI seems acceptable and relatively feasible. Further work will replicate these pilot findings, assess health outcomes and optimize feasibility and scalability to existing mental health services.