1. Muscle Physiology Laboratory Department of Kinesiology University of Massachusetts Amherst Amherst MA 01003 USA
2. Human Magnetic Resonance Center Institute for Applied Life Sciences University of Massachusetts Amherst Amherst MA 01003 USA
3. Mechatronics and Robotics Laboratory Department of Mechanical & Industrial Engineering University of Massachusetts Amherst Amherst MA 01003 USA