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. 2018 Aug 8;13(8):e0202026. doi: 10.1371/journal.pone.0202026

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© 2018 Fletcher, MacIntosh

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 6 — The solid line represents the linear relationship between E_run and muscle energy cost (r² = 0.368, p = 0.0213). Dashed lines represent the 95% confidence interval for the relationship. Note that the relationship crosses the abscissa at 0% change in muscle energy cost.