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. 2019 Feb 7;6:2055668319827466. doi: 10.1177/2055668319827466

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© The Author(s) 2019

Creative Commons Non Commercial CC BY-NC: This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (http://www.creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 7. — EMG frequency spectra from the VM under 30 Hz, 1.5 mm, 60% MVC (blue) and 50 Hz, 1.5 mm, 60% MVC (red) stimulation frequencies with 50 Hz notch filter application. VM: vastus medialis.