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. 2018 Dec 3;9:1735. doi: 10.3389/fphys.2018.01735

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Copyright © 2018 He, Tian, Valenzuela, Huang, Zhao, Hong, He, Yin and Lucia.

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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Peak concentration of fibroblast growth factor-21 (FGF-21) (A), follistatin (B), myostatin (C), interleukin (IL)-15 (D), irisin (E), ghrelin (F), and peptide YY (PYY) (G) in response to a session of high-intensity interval training with short (HIIT1) or long intervals (HIIT2), or resistance training (RT). All molecules were measured in 17 subjects except for IL-15 and PYY, which were measured in 9 and 14 subjects, respectively. Data are mean ± standard error. There were no significant differences between conditions.