1. From the Integrative Physiology Laboratory, Department of Physical Therapy, College of Applied Health Sciences, University of Illinois at Chicago (A.S., R.A., S.A.P.); Fisher Institute of Health and Well-Being, Ball State University, Muncie, IN (L.A.K.); Cardiology Division, VA Palo Alto Health Care System, CA (J.M.); and Stanford University, CA (J.M.).