AUTHOR=Ackerman Kathryn E. , Collomp Katia , Kater Claudio E. , Cadegiani Flavio Adsuara TITLE=Editorial: New Perspectives on the Endocrinology of Physical Activity and Sport JOURNAL=Frontiers in Endocrinology VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/endocrinology/articles/10.3389/fendo.2021.728756 DOI=10.3389/fendo.2021.728756 ISSN=1664-2392