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. 2013 Nov 8;8(11):e78373. doi: 10.1371/journal.pone.0078373

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© 2013 Damm et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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A: contact force F_res, B: friction moment M_res, C: coefficient of friction µ. Individual numerical mean values and ranges from 8 subjects. M_res1|M_res2, µ₁|µ₂ = values at the instant of the force maxima F_res1|F_res2 (see Figure 2). M_max, µ_max = absolute maxima during a whole walking cycle.