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. 2019 Sep 21;5(1):e000558. doi: 10.1136/bmjsem-2019-000558

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© Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution 4.0 Unported (CC BY 4.0) license, which permits others to copy, redistribute, remix, transform and build upon this work for any purpose, provided the original work is properly cited, a link to the licence is given, and indication of whether changes were made. See: https://creativecommons.org/licenses/by/4.0/.

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Numeric Pain Rating Scale (NPRS): (A) isometric group, (B) isotonic group. Global Rating of Change (GROC) Scale: (C) isometric group, (D) isotonic group. Note: due to the same scores reported for different participants, some lines overlap.