Introduction
Despite the fact that physical activity benefits healthy ageing [Computer-tailored advice is typically based on a brief survey of participants’ physical activity levels, characteristics, environment, and psychosocial correlates of physical activity [Older adults may interact with computer-tailored advice and Fitbit technology differently than middle-aged adults who make up most participants in evaluations of computer-tailored interventions and activity trackers [We recently conducted a randomised controlled trial to test the efficacy of a web-based physical activity intervention (