He also has adjunct appointments at the University of Kansas Medical Center and the University of Missouri-Kansas City School of Medicine. He has completed studies on the interaction between lifestyle (physical activity and eating behavior) and a variety of chronic diseases using a range of methodologies (clinical trials, epidemiology, etc.). His current research focuses on the concept of energy balance, which is the relationship between how many calories a person eats, how many they burn, and how they store excess calories in their body.