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. 2017 Nov 15;18:457. doi: 10.1186/s12891-017-1828-2

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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. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 3 — Correlation between cross-sectional area and muscle volume of the gluteus medius and muscle strength of hip abductor. a Cross-sectional area (CSA) and 3D muscle volume of the GMED were strongly correlated (r² = 0.82, p < 0.05). b and c CSA and muscle volume measurements were both positively correlated with muscle strength of the hip abductor (r² = 0.50, p < 0.05 and r² = 0.40, p < 0.05, respectively)