The Transtheoretical Model of Behaviour Change describes how people can move through various phases when they undergo change in their lives.
The research behind the Model is dedicated to solving the problem of how people intentionally change their behaviour, with and without professional intervention. The following question was the foundation for this investigation;
Are there basic, common principles, or stages that commonly occur when people make a change?
The research showed that YES! There were indeed similar structures underlying behaviour change in general, and thus the Transtheoretical Model of Behaviour Change (1983) was born.
The diagram above, the Exercise Motivation Change Cycle is an adaption of the original model.