Funded by the Centers for Disease Control and Prevention, Shape Up Somerville: Eat Smart. Play Hard. was a 3-year (2002-2005), environmental change intervention designed to prevent obesity in culturally diverse, high-risk, early-elementary school children. Led by Dr. Christina Economos (N96), the Shape Up team developed and implemented strategies designed to create energy balance for 1st-3rd graders in Somerville. In before-, during-, and after-school environments, interventions were focused on increasing the number of physical activity options available to children throughout the day and on improving dietary choices.