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. 2019 Oct 18;119(11):2655–2671. doi: 10.1007/s00421-019-04236-0

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© The Author(s) 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 2 — Individual levels of differences and the 95% limits of agreement between estimations of VO₂ (L · min⁻¹) calculated from fixed levels of low, middle and high HR from commuter walking as well as from repeated measurements of VO₂–HR relations based on three submaximal work rates (Model 1). The y axes show absolute differences in VO₂ against the mean values of the estimations from the repeated measurements on the x axes