Abstract: This paper describes a model of behaviour change support for a referral physical activity cancer service for young people. The service is underpinned by the self-determination (Deci & Ryan, 2008) principles of autonomy, competence, and relatedness. A range of tailored physical activity programmes are provided in community, in-patient and online settings. Each young person receives behaviour change support from motivational interviewing, which incorporates mental contrasting and implementation intentions. This paper seeks to share practice on how health psychology theory and techniques have been applied in order to support young people to be more physically active, both during and after their cancer treatment. Additionally, we share our experiences of providing consultancy to shape service development and planning.N/
