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. 2020 Feb 7;6:9. doi: 10.1186/s40798-020-0241-9

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© The Author(s). 2020

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 2 — The shank muscle-tendon unit velocity (v_sMTU) was estimated using the ankle angular velocity (ω_ankle), the linear velocity at the proximal end of the foot (v_linear), the shank muscle-tendon unit moment arm to the ankle joint centre (MA_sMTU), and the angle between v_linear and the shank segment (θ_foot/segment). Modified from [37]