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. 2020 Mar 16;28(11):5521–5528. doi: 10.1007/s00520-020-05407-y

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — Relative HR (a) and bLa (b) courses during M-VO_2peak, M-IAT, and M-VT (from left to right). Intensity during sessions was prescribed as follows: 70% VO_2peak (M-VO_2peak), 97% IAT (M-IAT), and 67% between VT1 and VT2 (M-VT). Dotted lines show courses of participants who terminated the session prematurely. The %HR_peak course of one patient is not displayed for M-VO_2peak due to a measurement problem