1. Department of Human Performance and Sport Sciences, Winston-Salem State University, C024 Anderson, 601 S Martin Luther King Jr Drive, Winston-Salem, NC 27110, USA
2. Department of Physical Therapy, Winston-Salem State University, Winston-Salem, NC 27110, USA
3. Department of Cardiology, Division of Cardiovascular Medicine, Veterans Affairs Palo Alto Health Care System, Stanford University, Palo Alto, CA 94304, USA