BackgroundEffective recruitment and retention of participants are prerequisites for high quality physical activity intervention programs and evaluation trials, but this is underreported in the literature making it difficult to identify the most promising strategies. Incorporating stakeholder feedback in the design of program components and recruitment materials can optimise recruitment reach and the engagement of participants throughout programs and trials.MethodsThe Active Women over 50 randomised controlled trial is testing a program designed to support women aged 50 + to be more physically active. To optimise program design and recruitment flyers, we conducted one focus group and 17 interviews with diverse purposively sampled women aged 50 + living in New South Wales, Australia. Women were asked to review recruitment flyers and the four proposed program components: (1) health coaching, (2) dedicated website with resources, (3) private Facebook group and (4) motivational email and SMS messages. Data analysis incorporated framework methods, deductive analysis using the Adapted Mobile App Rating Scale for evaluating websites and abductive analysis to critique the underlying program theory.ResultsFive themes were identified in relation to recruitment: I want to see (women like) myself, Keep it real, Readability is for everyone, Why should I do it? and Find us where we live. The four program components were strongly supported as a package, but were valued differently for their relative importance. Results were used to refine the health coaching scheduling; website appearance and content; promotion and moderation of the Facebook group; and the structure, appearance and content of messages. Not all suggestions were actionable due to technological and time constraints, and the desire to keep program costs low enough for delivery at scale during the study and beyond. The program theory was expanded to encompass two emergent concepts.ConclusionsThis consultation resulted in substantial refinements to recruitment flyers and strategies, and all four program components. We anticipate that these refinements will increase the reach and appeal of the trial and optimise future scale-up. Consultation feedback, while specific to this program, may have wider transferability for recruitment and the design of programs with similar components targeting women aged 50+.