Dr. Zan Gao, Life member of ICSPAH, Director of Physical Activity Epidemiology Laboratory at University of Minnesota, recently published a book titled “Physical Activity Behaviors and Determinants in Children and Adolescents” with a group of his students. By providing analyses and interpretation of children and adolescents’ physical activity behaviors through the lens of well-established psychological and/or health promotion theories, this book provides empirically-based conclusions and implementation strategies for scholars and practitioners who desire to promote physical activity participation and better health outcomes among these populations. Within this book readers can expect to find chapters devoted to the analyses of physical activity behavior among children and adolescent in freeliving and physical education settings with an emphasis of how the manipulation of physical activity determinants, such as physical activity self-efficacy, enjoyment, situational interest and social support, influence physical activity participation. Other aspects of the book include a synthesis how variables such as parent’s beliefs regarding physical activity, perceived exertion, as well as youth’s gender and age affect the related physical activity determinants and the subsequent implementations of physical activity interventions. It is hoped that through the current book’s structured formatting and writing quality, scholars and practitioners can better formulate real-world physical activity intervention programs which provide the best opportunity to youth to be more physically active and healthy.