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. 2019 Mar 20;10:244. doi: 10.3389/fphys.2019.00244

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Copyright © 2019 Chuang, Sung, Chen, Liao and Chou.

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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Experiment design and procedure of match in accordance with current Olympic TKD competition time frame. (A) Four consecutive combat matches were performed at 8:30, 10:30, 14:00, and 16:30. The blood samples were drawn before matches (7:00), after the completion of the last match (17:00), and on Next day (07:00; 24 h after the first match). (B) Three different kicks were used in the intermittent interval exercise (10-s kicking with full effort and 10-s bouncing jumping break) in the present study, and the movements used to reconstruct real TKD competition during the TMSK, including (1) sidekick, (2) reverse side kick, and (3) roundhouse kick. The individuals in this manuscript gave written informed consent to use and publish these image details. TMSK: TKD-match simulated kicks; STC: simulated TKD competition.