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. 2017 Mar 18;3:13. doi: 10.1186/s40798-017-0079-y

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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. 5 — Correlation between change in fluid intake (L kg BM lost⁻¹) and change in continuous exercise performance (Hedges’ g) controlling for ambient environmental temperature, exercise duration, level of dehydration and the ecological validity of the exercise protocol. Circle diameter corresponds to the weight of each study. Hedges g = −0.557 + 0.002 × fluid volume (L kg BM lost⁻¹) + 0.025 × temperature (°C) + 0.011 × exercise duration (min) + 0.218, if ecologically valid + 0.0126 × level of dehydration (% BM lost)