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. 2019 Mar 27;8(3):e10970. doi: 10.2196/10970

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©Daniel P Fitze, Martino Franchi, Werner L Popp, Severin Ruoss, Silvio Catuogno, Karin Camenisch, Debora Lehmann, Christian M Schmied, David Niederseer, Walter O Frey, Martin Flück. Originally published in JMIR Research Protocols (http://www.researchprotocols.org), 27.03.2019.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR Research Protocols, is properly cited. The complete bibliographic information, a link to the original publication on http://www.researchprotocols.org, as well as this copyright and license information must be included.

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The study design timeline. CON: concentric protocol; ECC: eccentric protocol; PRE: before training period; POST: after training period; VO_2peak: peak oxygen uptake; P_peak: peak aerobic power output; HR: heart rate; BP: blood pressure; BL: blood lactate; NIRS: near-infrared spectroscopy; SmO₂: muscle oxygen saturation.