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. 2021 Nov 10;52(3):527–546. doi: 10.1007/s40279-021-01590-y

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — Included metabolites on the super class level. a Metabolites super classes positively associated with cardiorespiratory fitness. b Metabolites super classes negatively associated with cardiorespiratory fitness. n number of metabolite species. Figure was created with the Mind the Graph platform (www.mindthegraph.com) and Adobe Illustrator 2021 (Adobe Inc., San Jose, CA, USA)