Participant Experiences With a Peer-Led Healthy Lifestyle Intervention for People With Serious Mental Illness.

Objective: This study explored the experiences of individuals with serious mental illness who were predominantly Black, were living in supportive housing, and participated in the Peer-Led Group Lifestyle Balance (PGLB) intervention. The authors examined how participants engaged in the process of behavior change and applied intervention concepts.

Methods: Focus groups and interviews with 63 participants explored their motivation for engaging with PGLB, challenges to behavior change, and how they integrated intervention strategies into their lives. Interviews were transcribed and analyzed with grounded theory.

Results: A grounded model summarized the description of the cycle of behavior change and provided insight into participants' decision-making processes. Challenges to engaging in healthy lifestyle change were related to participants' general medical health, time constraints, lack of knowledge, difficulties breaking old habits and changing self-perceptions, mood state, and the social-physical environment. Participants applied many intervention strategies, such as addressing problematic social cues, contexts, and food associations; planning ahead; starting with smaller changes; portion control; food substitution; mindful eating; and integrating changes into their daily lives. They reported various behavior changes with respect to eating and physical activity and more limited shifts in self-monitoring.

Conclusions: Improving the health of people with serious mental illness will require expanding their access to healthy lifestyle interventions in community-based settings. The findings suggest that future interventions should expand support for self-monitoring, meal planning, tailored physical activity, and advocacy. Such interventions should also enhance participants' understanding of the corresponding impact of changes on weight loss and emphasize subjective wellness outcomes to maintain motivation.