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The spring in your step is more than just a good mood
Date:4/23/2008

or them to have a powered push off at the ankle," Ferris said.

An example of this for running is the prosthetic used by controversial Olympic hopeful Oscar Pistorius, a double-amputee who wears a special curved blade called a Cheetah. As the blade compresses on strides it stores energy, which is released during push off, similar to a human ankle.

However, the Cheetah is great for sprinting but would not work for walking. The foot is on the ground too long to take advantage of the energy return during walking. The muscle and tendon act more like a catapult during walking, storing energy slowly and releasing it at just the right moment.

The next step, Ferris said, is to build a bionic hip and measure the efficiency of the hip during walking.


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Contact: Laura Bailey
baileylm@umich.edu
734-647-1848
University of Michigan
Source:Eurekalert

Page: 1 2

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