title: Invited commentary.
authors.affiliation: Department of Physical Therapy, 212-2177 Wesbrook Mall, University of British Columbia, Vancouver, British Columbia, Canada. Janice.Eng@vch.ca
authors.forename: Janice J
authors.initials: JJ
authors.lastname: Eng
mesh_terms: D001696:Biomechanical Phenomena / Q000502:physiology; D005684:Gait / Q000502:physiology*; D006801:Humans; D008954:Models, Biological; D009068:Movement / Q000502:physiology; D016138:Walking / Q000502:physiology*