AUTHOR= Frontiers Editorial Office TITLE=Retraction: The Effects of Physical Exercise on Cognition: How Heart Rate Variability Can Predict Cognitive Performances JOURNAL=Frontiers in Human Neuroscience VOLUME=14 YEAR=2021 URL=https://www.frontiersin.org/journals/human-neuroscience/articles/10.3389/fnhum.2020.628402 DOI=10.3389/fnhum.2020.628402 ISSN=1662-5161