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. 2020 Sep 3;8:735. doi: 10.3389/fbioe.2020.00735

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Copyright © 2020 Ortiz, Ferrero, Iáñez, Azorín and Contreras-Vidal.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Times of the mental events during the experimental trials. Both trials included a previous time of 15 s followed by a 10 s rest period. In the case of training trials, this period was followed by walk/mathematical count/stop events. Test trials for testing did not include the mathematical count event and had an extended final stop event to allow the Rex to stop. As first and last steps of the exoskeleton had a variable time, extra windows of time of 5 s for the start and 4 s for the stop were considered.