Abstract
BACKGROUND: Older Black adults have high rates of physical function (PF) limitations. Physical activity (PA) is effective for improving PF and reducing mobility disability risk; however, community-based PA interventions focused on improving PF for older Black adults are lacking. Given the importance of churches as trusted institutions in Black communities, church-based interventions developed through community collaborations may help increase access to PA interventions. METHODS: Keep it Movin' is a church-based cluster randomized controlled trial testing the effectiveness of a 24-week group-based (intervention arm) versus a self-guided (comparator arm) program in improving PF among Black adults aged ≥ 40 years with PF limitations (short physical performance battery [SPPB] score ≤ 9). A church-wide virtual walking program is available to congregants in both arms. The intervention arm receives weekly group-based classes held at the church that include education, goal setting, and structured PA (walking, lower-extremity strength, balance, and stretching). The comparator arm receives educational materials about PA appropriate for people with PF limitations. Outcomes are assessed at 6 (program completion) and 12 months (maintenance). The primary outcome is PF change as measured by the SPPB at 6 months. Secondary outcomes include change in moderate-to-vigorous PA, social support and self-efficacy for PA, quality of life, and self-reported PF. Factors related to successful adoption, implementation, and maintenance are assessed using the Reach, Effectiveness, Adoption, Implementation, and Maintenance (RE-AIM) framework. CONCLUSION: This is the first study to evaluate the effectiveness of a group-based PA program delivered in Black churches to improve PF.