1. Health Assessment Laboratory, University of Massachusetts Lowell, Lowell, Massachusetts;
2. Department of Physical Therapy and Kinesiology, University of Massachusetts Lowell, Lowell, Massachusetts;
3. Human Performance and Sport Physiology Laboratory, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin;
4. Department of Rehabilitation Sciences and Technology, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin; and
5. Department of Electrical and Computer Engineering, University of Massachusetts Lowell, Lowell, Massachusetts