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. 2021 Sep 28;3:689805. doi: 10.3389/fspor.2021.689805

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Copyright © 2021 Steidten, Baumbach, May, Gabriel, Herbsleb, Markov, Granacher, Kellmann, Bloch, Gabriel and Puta.

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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Changes during morning measurements of white blood cells (A) and granulocytes (B) and the Systemic Inflammation Index (C) over a 4-day (three nights) observational period.