The relationship between physical activity, exercise and health has been long established. However, it is comparatively recently that the emphasis has moved from physical activity in the prevention and treatment of physical conditions towards the role of physical activity in the maintenance of psychological wellbeing and mental health. In this module we will examine and critique the theoretical basis of this development and establish a platform for the applied work which is undertaken as part of the module. Specifically you will learn about the contemporary research explaining why people chose to become physically active and also why some people chose to remain sedentary. You will learn about the acute responses and chronic adaptations to physical activity. You will learn about the psycho-social dimension of exercise in relation to self- referent cognitions such as self-esteem. You will examine the processes of behavioural change in relation to the adoption of physical activity. This module conforms to the QAA benchmark (Unit 25: Benchmark statements for Hospitality, Leisure, Sport and Tourism, QAA, 2008) statement in that it develops knowledge, intellectual and applied skills in relation to health enhancing physical activities. The core learning experience of this module is to examine and critique the processes underpinning behavioural change. This is achieved through individual behavioural change projects with a client not currently adhering to the recommended guideline levels of physical activity.The project work is supported by a lecture programme examining key lines of theory: the trans-theoretical model, self-determination theory, modern approaches to self-referent thought, the relationship between physical activity, affect, emotion and mood. We will also look at the role of physical activity in enhancing quality of life.