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. 2024 Aug 1;36(8):441–446. doi: 10.1589/jpts.36.441

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2024©by the Society of Physical Therapy Science. Published by IPEC Inc.

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives (by-nc-nd) License. (CC-BY-NC-ND 4.0: https://creativecommons.org/licenses/by-nc-nd/4.0/)

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Fig. 2. — Measurement of muscle brightness.