From the Department of Physical Therapy (T.M.K., D.S.R. K.S.R., S.A.B.-M.), Graduate Program in Biomechanics and Movement Science (R.P., D.S.R., A.J., K.S.R., J.S.H., S.A.B.-M.), and Department of Mechanical Engineering (J.S.H.), University of Delaware, Newark, Del. (At 2009-12)