Article

The purpose of this research study was to determine the dynamics of early human
response from sudden ankle inversion (30 degrees tilt). Changes in vertical
ground reaction forces (GRFs) following trapdoor release in a group of healthy
subjects were compared to those from the similar experiments using a chair with
two U shaped steel legs and matched weights of the human subjects. The
experiments with the chair were further repeated with additional foam paddings at
their bases to introduce visco-elastic properties to legs of the chair. Following
the trapdoor release a decrease in the vertical ground reaction force under the
inverting leg and subsequent increase in the supporting leg were observed in both
human and chair experiments. The short onset of changes in vertical GRFs in our
experiments indicate that the dynamic features of early response following
trapdoor release are primarily due to mechanical events and may not be
significantly affected by the neuromuscular reaction of human subjects.
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Langue : ANGLAIS