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First published online March 14, 2008
Journal of Experimental Biology 211, 1087-1092 (2008)
Published by The Company of Biologists 2008
doi: 10.1242/jeb.012443
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The effect of increasing inertia upon vertical ground reaction forces and temporal kinematics during locomotion

John K. De Witt1,*, R. Donald Hagan2 and Ronita L. Cromwell3

1 Wyle's Life Sciences Group, Houston, TX 77058, USA
2 NASA – Johnson Space Center, Houston, TX, USA
3 Department of Physical Therapy, The University of Texas Medical Branch, Galveston, TX, USA


Figure 1
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  		Fig. 1. Data collection procedures showing the unweighting system and weighted vest.

 

Figure 2
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  		Fig. 2. Mean ensemble ground reaction force (GRF) trajectories during walking at all added mass (AM) levels. AIF, added inertial force; BW, body weights.

 

Figure 3
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  		Fig. 3. Mean ensemble ground reaction force (GRF) trajectories during running at all added mass (AM) levels. AIF, added inertial force; BW, body weights.

 

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© The Company of Biologists Ltd 2008