The Arnold Healthy Kids Initiative (AHKI) research group is a multidisciplinary group of researchers working on issues related to childhood obesity. Located in the Department of Exercise Science in the Arnold School of Public Health, the AHKI faculty have expertise in public health, physical education, pediatric psychology, and nutrition. Research within the group is generally focused on interactions among associated determinants of childhood obesity (i.e., physical activity, sedentary behaviors, sleep, and diet). The goals of the AHKI are to advance the science of measurement of obesogenic behavior, uncover etiology of obesity and test interventions to prevent and treat childhood obesity.