1. Biomechanics Laboratory, Department of Kinesiology, Pennsylvania State University, University Park, PA, USA.
2. Integrative and Biomedical Physiology Program, Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, PA, USA.
3. School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA.
4. School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA.
5. Institute for Robotics and Intelligent Machines, Georgia Institute of Technology, Atlanta, GA, USA.