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. 2017 Mar 22;47(Suppl 1):65–78. doi: 10.1007/s40279-017-0688-0

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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. 2 — An example of the estimation of critical speed and D′ in Haile Gebrselassie, using the linear distance–time model. The distances modelled ranged from 2 km (4:56.1) to 15 km (41:38). Critical speed was 5.91 m s⁻¹ and D′ was 351 m. CS critical speed, D′ curvature constant of speed–time relationship, R ² coefficient of determination