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Pre-publication history The pre-publication history for this paper can be accessed here: http://www.biomedcentral.com/1471-2458/11/120/prepub doi:10.1186/1471-2458-11-120 Cite this article as: MacMillan et al.: West End Walkers 65+: A randomised controlled trial of a primary care-based walking intervention for older adults: Study rationale and design. BMC Public Health 2011 11:120. Submit your next manuscript to BioMed Central and take full advantage of: • Convenient online submission • Thorough peer review • No space constraints or color ﬁgure charges • Immediate publication on acceptance • Inclusion in PubMed, CAS, Scopus and Google Scholar • Research which is freely available for redistribution Submit your manuscript at www.biomedcentral.com/submit