The Trans theoretical Model (TTM) of Behavior Change provides new and helpful insights for health education. Also, it explains the process of how people attempt to modify health-risk behaviors. It is successfully applied to a variety of health behavior areas, including smoking cessation, weight control, dietary change, exercise acquisition, and stress management. Within this model, there are sets of common principles that explain why people succeed and fail in changing their behavior. Research has provided strong support for the reliability and validity of the model’s core constructs, including stages of change, processes of change, pros and cons of decisional balance, and self-efficacy. Fox and Kilvert, 2003. TTM defines behaviour change as
