Internet interventions provide an opportunity to encourage patients with LBP to self-manage and remain active, by tailoring advice and providing evidence-based support for increasing physical activity. This paper reports the development of the ‘SupportBack’ internet intervention, designed for use with usual primary care, as the first stage of a feasibility RCT currently underway comparing: usual primary care alone; usual care plus the internet intervention; usual care plus the internet intervention with physiotherapist telephone support. The internet intervention delivers a 6-week, tailored programme focused on graded goal setting, self-monitoring, and provision of tailored feedback to encourage physical activity/exercise increases or maintenance. 22 patients with back pain from primary care took part in ‘think aloud’ interviews, to qualitatively explore the intervention, provide feedback on its relevance and quality and identify any extraneous content or omissions.Background:
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