Susan B. Racette, Ph.D., is a Professor of Physical Therapy and Medicine at the Washington University School of Medicine where her research focuses on diet and exercise interventions to promote health and fitness and reduce cardiovascular disease risk factors in a variety of populations. Current areas of investigation include the effects of caloric restriction on aging, dietary phytosterols and their influence on cholesterol metabolism, and initiatives to enhance physical activity, cardiorespiratory fitness, and favorable weight status.