Cardiovascular disease is the single greatest cause of death throughout most of the world. Making healthy lifestyle changes remains the most important part of any successful treatment strategy. This book centres on the experiences of 13 individuals who, after experiencing major heart problems, participated in a cardiac rehabilitation program that helped them to learn healthy lifestyle practices. In this study, the progress of each participant is picked up one year after completing cardiac rehabilitation. About half the participants interviewed maintained healthy lifestyle change while the other half reverted back to their usual lifestyle patterns. Participants'' experiences were explored and analysed based on Mezirow''s Transformative Learning theory. The main difference between those who made healthy changes and those who did not was the nature of the interactions between the individual and both health care professionals and others throughout their illness and recovery experience. The results provide many insights for health care professionals whose main work is to help adults make healthy and lasting lifestyle change.