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. 2018 Feb 7;9:60. doi: 10.3389/fphys.2018.00060

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Copyright © 2018 Camacho-Cardenosa, Camacho-Cardenosa, Burtscher, Martínez-Guardado, Timon, Brazo-Sayavera and Olcina.

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 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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Schematic representation of the four exercise prescriptions allocated at randomisation. AitH: Aerobic interval training Hypoxia group; AitN: Aerobic interval training Normoxia group; SitH: Sprint interval training Hypoxia group; SitN: Sprint interval training Normoxia group; Wmax: maximal work-load; FiO₂: inspired fraction of oxygen.