She is also a licensed psychologist. Professor Lewis received her Ph.D. in Clinical Psychology and completed postdoctoral training in behavioral interventions for exercise. Her groundbreaking research focuses on how to motivate sedentary adults, especially women, to become more physically active. Professor Lewis has authored several articles in top-tier academic journals and serves as the Principal Investigator on grants funded by the National Institutes of Health. Currently, she is the Principal Investigator on a study examining the effect of exercise on preventing postpartum depression.