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. 2023 Jun 14;14:1197224. doi: 10.3389/fphys.2023.1197224

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Copyright © 2023 Yang, Wang, Yuan, Shen, Cai, Wang, Hu, Song, Wang and Zhang.

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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PCA, OPLS-DA analysis and coefficient of urine metabolites. (A) PCA analysis; (B) OPLS-DA score plot; R ² Y = 0.507, Q ² = 0.167 (p < 0.001); (C) Multicolor loading graph of urine metabolites analysis. 1: sub-elite level swimmers, 2: elite level swimmers.