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. 2020 Dec 17;2:540930. doi: 10.3389/fspor.2020.540930

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Copyright © 2020 Frechette, Abou, Rice and Sosnoff.

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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Illustration of two participants completing the seated postural control assessment. (A) represents a participant facing the side, (B) represents a participant facing forward, (C) depicts the research-grade accelerometer affixed to the back of the smartphone and the aligned axes orientation (ML, medial-lateral; AP, anterior-posterior), and (D) provides an example plot of accelerometry data from the smartphone and research-grade accelerometer, recorded during the Functional Stability Boundary Test.