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. 2017 Jul 3;117(9):1787–1798. doi: 10.1007/s00421-017-3675-0

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© The Author(s) 2017

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. 1 — a The knee dynamometer measuring the power output of the right leg during stimulation with the SES setup. The leg brace, the lever arm with the load cell and the chain drive system are visible. b SDSS setup with the four small electrodes replacing the active electrodes. Electrodes were placed as close as possible to the located motor points. c SES setup with two pairs of electrodes. Active electrodes were placed on the motor points of m. vastus medialis and m. vastus lateralis. Motor points are highlighted with an orange cross (colour figure online)