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. 2018 Aug 17;9:1144. doi: 10.3389/fphys.2018.01144

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Copyright © 2018 Pires, dos Anjos, Covolan, Fontes, Noakes, St Clair Gibson, Magalhães and Ugrinowitsch.

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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O₂Hb (A), THb (B), and HHb (C) concentrations measured at prefrontal cortex (PFC) during MIT in control, caffeine and placebo (perceived as caffeine). Main effects of time and ingestion and time by ingestion interaction effects were reported in the figure. Values are mean (± SD).