Obesity in children and adolescents is a serious issue with many health and social consequences that often continue into adulthood. Implementing prevention programs and getting a better understanding of treatment for youngsters is important to controlling the obesity epidemic. The term "childhood obesity" may refer to both children and adolescents. Between 5-25 percent of children and teenagers in the United States are obese. As with adults, the prevalence of obesity in the young varies by ethnic group. It is estimated that 5-7 percent of White and Black children are obese, while 12 percent of Hispanic boys and 19 percent of Hispanic girls are obese. Some data indicate that obesity among children is on the increase. The second National Children and Youth Fitness Study found 6-9 year olds to have thicker skinfolds than their counterparts in the 1960s. During the same period, others documented a 54 percent increase in the prevalence of obesity among 6-11 year olds. This book examines leading research in this area of great concern to society.