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. 2021 Jul 6;11:13911. doi: 10.1038/s41598-021-92670-6

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Flowchart of the study. Incremental test and reproducibility of the outcome measures (A), experimental phase (B), detailed experimental phase sessions (C). Note: the order of the experimental sessions was randomized, the numbers in the boxes do not imply a fixed order. HD-tDCS = high-definition transcranial direct current stimulation; HR = heart rate; RPE = ratings of perceived exertion; tDCS = transcranial direct current stimulation; TTE = time to exhaustion.