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First published online December 1, 2006
Journal of Experimental Biology 209, 4895-4900 (2006)
Published by The Company of Biologists 2006
doi: 10.1242/jeb.02584
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Mechanical energy fluctuations during hill walking: the effects of slope on inverted pendulum exchange

Jinger S. Gottschall* and Rodger Kram

Department of Integrative Physiology, University of Colorado, Boulder, CO 80309, USA


Figure 1
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  		Fig. 1. Force measuring treadmill mounted at 9°.

 

Figure 2
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  		Fig. 2. Center of mass mechanical energy versus time for a typical subject (54 kg). Solid lines indicate double support periods and dotted lines indicate single support periods.

 

Figure 3
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  		Fig. 3. (A) Combined gravitational potential energy and kinetic energy (GPE+KE) curves at -9°, level and +9°. (B) Transformed (tGPE+KE) energy curves at -9°, level and +9° excluding the overall work necessary to lower or raise the center of mass.

 




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