Fig. 3. %RVC in the CES and UT. EMG, electromyography; %RVC, percentage of reference voluntary contraction; CES, cervical erector spinae; UT, upper trapezius. *p < 0.05, **p < 0.01.

Phys. Ther. Korea 2023;30:221~229 https://doi.org/10.12674/ptk.2023.30.3.221

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