Department of Health Sciences and Kinesiology, Biodynamics and Human Performance Center, Georgia Southern University (Armstrong Campus), Savannah, GA 31419, USA. Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, UT 84132, USA; Geriatric Research, Education, and Clinical Center, George E. Wahlen Department of Veterans Affairs Medical Center, Salt Lake City, UT 84148, USA. Neurovascular Physiology Laboratory, School of Kinesiology, Auburn University, Auburn, AL 36849, USA. Neurovascular Physiology Laboratory, School of Kinesiology, Auburn University, Auburn, AL 36849, USA. Electronic address: atr0026@auburn.edu.