Journal Pre-proof Commentary: About the logical, theoretical, and physiological differences between the pre-task and post-task measurements of cardiac vagal activity Sylvain Laborde PII: S0031-9384(19)30894-7 DOI: https://doi.org/10.1016/j.physbeh.2019.112685 Reference: PHB 112685 To appear in: Physiology & Behavior Received date: 23 August 2019 Revised date: 17 September 2019 Accepted date: 17 September 2019 Please cite this article as: Sylvain Laborde , Commentary: About the logical, theoretical, and physio- logical differences between the pre-task and post-task measurements of cardiac vagal activity, Physi- ology & Behavior (2019), doi: https://doi.org/10.1016/j.physbeh.2019.112685 This is a PDF ﬁle of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the deﬁnitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its ﬁnal form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. © 2019 Published by Elsevier Inc.