Critical review the psychological theory in an intervention designed to increase health-enhancing physical activity

Critically review one empirical research paper (I chose) that has studied the use of a psychological theory in an intervention designed to increase health-enhancing physical activity. Summarise how the theory was used to guide behaviour change and appraise how successful you think this was.
Credit will be given for well organised answers, easy to follow, written in good English, and draw on appropriate material from outside class, such as readings (particularly additional primary sources) and reputable websites. Reliance on book chapters is unlikely to be sufficient.