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. 2013 Summer;12(2):133–138. doi: 10.1187/cbe.13-03-0056

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© 2013 D. W. C. Liu. CBE—Life Sciences Education © 2013 The American Society for Cell Biology. This article is distributed by The American Society for Cell Biology under license from the author(s). It is available to the public under an Attribution–Noncommercial–Share Alike 3.0 Unported Creative Commons License (http://creativecommons.org/licenses/by-nc-sa/3.0).

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Figure 2. — Measurements of the forces occurring at the ground for (a) a barefoot runner vs. (b) a shod runner when striking with the heel. Note how much bigger and sharper the initial impact transient is when not cushioned by a shoe. (From http://barefootrunning.fas.harvard.edu.)