The prevention and treatment of obesity and mental health disorders in adolescence are two major public health problems in the United States (U.S.) today. The incidence of adolescents who are overweight or obese has increased dramatically over the past 20 years, with approximately 17.1 percent of teens now being overweight or obese. Furthermore, approximately 15 million children and adolescents (25 percent) in the U.S. have a mental health problem that is interfering with their functioning at home or at school, but less than 25 percent of those affected receive any treatment for these disorders. The prevalence rates of obesity and mental health problems are even higher in Hispanic teens, with studies suggesting that the two conditions often coexist in many youth. However, despite the rapidly increasing incidence of these two public health problems with their related health disparities and adverse health outcomes, there has been a paucity of theory based intervention studies conducted with adolescents in high schools to improve their healthy lifestyle behaviors as well as their physical and mental health outcomes. Unfortunately, physical and mental health services continue to be largely separated instead of integrated in the nation's healthcare system, which often leads to inadequate identification and treatment of these significant adolescent health problems.