Understanding systems and rhythms for minority recruitment in intervention research.

We describe one approach for recruitment and retention of minority individuals in intervention research using a systematic environmental perspective based on Bronfenbrenner's ecological systems (BES) model and the construct of temporality. An exemplar in a physical activity intervention study with low-income and primarily African American women is presented. The exemplar illustrates application of BES and temporality to enhance recruitment and retention in research focused on understanding and accommodating environmental influences. Using this theory based approach resulted in successful recruitment and a high level of participant retention.