My main research interest has been on designing and evaluating health behaviour change interventions for improving mental and physical health among participants with low mood, weight concerns, diabetes and other chronic conditions. Research on the acute and chronic effects of exercise on smoking related outcomes has been cited in the guidance on smoking cessation in the US, Canada, Australia and other countries, Methodologically, I have conducted many laboratory studies, led 6 randomised controlled trials, led various systematic reviews and meta-analyses, and qualitative research.