ABSTRACT
This chapter provides the theories that have been developed and categorised into five areas: self-regulation and motivation, social cognitive, stage based, belief and body image. Within each area, the key theories which are regularly used within exercise psychology are discussed. Self-regulation and motivational frameworks have been developed to help us understand what inspires and influences us to take up and continue with physical activities. One of the most well-used motivational theories is the Self-Determination Theory. The Broaden and Build Theory focuses on positive emotions. It describes how these positive emotions (such as joy, interest, contentment and love) move us away from the negative automatic and immediate responses we often have (often responding to threat or fear) and instead broaden our mindset. Belief models focus internally. They look at our perception of ourselves, the exercise and the environment we are putting ourselves into before we decide whether are capable or willing to engage with exercise.
