Zan Gao, Ph.D., assistant professor in kinesiology and director of the Physical Activity Epidemiology Laboratory (PAEL), recently edited a book titled “Physical activity behaviors and determinants in children and adolescents” along with his doctoral student, the co-editor, Zachary Pope. By providing analyses and interpretation of children’s and adolescent’s 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.