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. 2018 Jan 13;118(3):595–605. doi: 10.1007/s00421-017-3794-7

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© The Author(s) 2018

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. 5 — Surface electromyography (EMG) responses (expressed relative to M-wave amplitude) during the 60 MVC test for placebo (clear circles) and acetaminophen (filled circles) trials. Mean ± SE EMG responses are presented in a with the EMG response from a representative individual presented in b, for the 5th and 55th contractions, respectively, for PL (grey line) and ACT (black line). Individual representative data for M-wave can be seen in panel C for the 6th and 54th contractions, respectively, for PL (grey line) and ACT (black line). *Significantly different from placebo (P < 0.05)