With a balance of theory, research, and applications, Motivation for Sustaining Health Behavior Change: The Self-as-Doer Identity introduces the self-as-doer identity as an accessible motivational identity and discusses how it can be incorporated into health behavior change efforts. The book introduces the self-as-doer theory and presents research and recommendations for how the self-as-doer can be used in both clinical and non-clinical populations to promote health behavior change and maintenance. The book will be of interest to researchers, students, and professionals interested in health promotion.