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. 2021 Mar 23;12:650507. doi: 10.3389/fphys.2021.650507

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Copyright © 2021 Risch, Mayer and Cassel.

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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Study design. ME, medical examination; VISA-A, Victorian Institute of Sports Assessment-Achilles Questionnaire; U_pre-U₁₂₀, Ultrasound examinations at baseline and 5, 30, 60, and 120 min after exercise; IAT, individual anaerobic threshold.