This study seeks to better understand the role of cultural identity and identity-based motivation. These two cultural factors may help to explain racial/ethnic disparities in pediatric obesity among African-American and Latino-American adolescents. This project utilizes Identity-Based Motivation Theory to clarify the complex relationships between culture, physical activity, diet and obesity risk. Culture has important implications for obesity risk in racial/ethnic minority youth. Therefore, the overall goal of this study is to examine the relationships between cultural identity and identity-based motivation, physical activity, diet and obesity risk in African-American and Latino-American adolescents. This project will inform our laboratory’s research agenda of developing culturally-appropriate strategies to increase health promotion behaviors and reduce pediatric obesity in African-American and Latino-American adolescents. This study is funded by the University of Michigan Office of the Vice President for Research.