James F. Sallis, PhD is a Distinguished Professor in the Department of Family Medicine and Public Health, Division of Behavioral Medicine. He also is Director of Active Living Research, a program of the Robert Wood Johnson Foundation. His primary research interests are promoting physical activity and understanding policy and environmental influences on physical activity, nutrition, and obesity. He is the author of over 500 scientific publications, on the editorial boards of several journals, and one of the world's most cited authors in the social sciences. He received a Lifetime Achievement Award from the President's Council on Fitness, Sports, and Nutrition, and Time Magazine identified him as an "obesity warrior".