BACKGROUND: With high rates of obesity, low levels of physical activity (PA), and lack of adherence to physical activity guidelines (PAGs) among African American (AA) breast cancer survivors (BCSs), culturally appropriate interventions that address barriers to participation in PA are needed. METHODS: To develop intervention content, members of an AA breast cancer support group participated in four 1-hour focus group discussions (related to the barriers to PA, strategies for overcoming them, and intervention content), which were audiotaped, transcribed, and analyzed. RESULTS: The support group collaborated with researchers to construct the Physical Activity Intervention Developed (PAID) to Prevent Breast Cancer, a multi-component (educational sessions; support group discussions; and structured, moderately intensive walking, strength training, and yoga), facilitated, 24-week program focused on reducing multi-level barriers to PA that promote benefits ('pay off') of meeting PAGs. CONCLUSIONS: Community engagement fostered trust, promoted mutuality, built collaboration, and expanded capacity of AA BCSs to participate in developing an intervention addressing individual, interpersonal, organizational, and community barriers to PA.