The aim of this chapter is to highlight how non-clinical variables related to physical activity, sport and exercise can add to the psychological formulation process by complementing traditional models of constructing formulation. This chapter considers the use of assessment data derived through the assessment interview method. Sport and exercise is used as a working example of an area of a person's life likely to be considered low in clinical relevance but high in potential for impacting positively on formulation. This chapter highlights the potential clinical relevance of sport and exercise, an area of a client's life not often considered as standard in ‘standardised’ assessment. Sport and exercise was chosen given its dominance as a hobby in society in general but also because activity is one the factors that gets impacted upon negatively when psychological imbalance becomes psychological disorder.