The George Washington University Medical Center, School of Public Health and Health Services, Department of Exercise Science, Washington, DC (Dr Hamm); School of Nursing, Auburn University, Auburn, AL (Dr Sanderson); School of Medicine, University of Vermont, Burlington, VT (Dr Ades); Stanford Prevention Research Center, Stanford University School of Medicine, Stanford, CA (Ms Berra); Human Performance Laboratory, Ball State University, Muncie, IN (Dr Kaminsky); Exercise and Sport Science Department, Rockhurst University, Kansas City, MO (Dr Roitman); and School of Medicine, Creighton University, Omaha, NE (Dr Williams).