Invited commentary.
Krebs
David E
DE
Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA.
D001696:Biomechanical Phenomena; D006801:Humans; D009068:Movement / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology; D011187:Posture / Q000502:physiology*