She received her doctorate in clinical psychology with an emphasis in behavioral medicine in 1990 from the joint doctoral program at UCSD and SDSU. Her pre-doctoral internship in behavioral medicine was completed at Brown University School of Medicine. Dr. Calfas is an original member of the PACE team and is co-principal investigator on four currently funded PACE intervention clinical trials. She is co-founder of the San Diego Center for Health Interventions, LLC. She has authored over 100 scientific articles, book chapters and abstracts. Dr. Calfas has lectured nationally and internationally on exercise adherence and related topics.