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. 2019 Dec 20;1:65. doi: 10.3389/fspor.2019.00065

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Copyright © 2019 Sanderson, Cescon, Heneghan, Kuithan, Martinez-Valdes, Rushton, Barbero and Falla.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Depicting (A) the approximate positioning of the HDEMG grids over the lumbar and lumbothoracic erector spinae (ES), 2 cm lateral to the spinous processes and spaced 5 mm between grids; (B,C) a schematic of the HDEMG electrode grid depicting the inter-electrode distance, the positioning of the x- and y-axes and showing the location of the missing electrode (not to scale).