This updated edition of the groundbreaking first edition identifies changes in U.S. children and adolescents' obesity levels within the past decade, examining factors contributing to obesity in this younger generation as well as possible solutions. This comprehensive review of obesity in childhood and adolescence describes the many factors that contribute to obesity, how to prevent it, and how to manage it in those who already experience its effects. Written by specialists in biological, psychological, social, and behavioral fields, these volumes take an interdisciplinary approach to the subject, offering readers a broad understanding of the systemic complexity of obesity from a public health perspective. The public must be aware of the deep and extensive roots of the problem in order to make informed decisions about policies related to school and nutritional practices, health care costs, and more. Factors contributing to obesity in children and adolescents range from obvious ones such as quantity of food consumed and amount of physical exercise undertaken to how friendly the neighborhood environment is for outdoor activities and the affordability of nutritional foods such as fruits and vegetables. With the information in these volumes, readers will feel empowered to help their clients, families, and communities.