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. 2017 Nov 17;48(5):1269–1279. doi: 10.1007/s40279-017-0816-x

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© The Author(s) 2017

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. 3 — a Mean (SD) heart rate at 4-km intervals for 20-km time trials in cool (CoolSolo) and hot (HotSolo) environments, and a 20-km simulated head-to-head competition in a hot environment (HotH2H). b Mean (SD) rate of oxygen uptake (n = 17) for 4-km segments for CoolSolo, HotSolo and HotH2H. $\dot{V}$ O _2max maximum oxygen uptake. a Significant difference (p < 0.05) between CoolSolo and HotSolo; b significant difference (p < 0.05) between HotSolo and HotH2H; c significant difference (p < 0.05) between CoolSolo and HotH2H