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. 2020 May 29;15(5):e0233545. doi: 10.1371/journal.pone.0233545

Fig 8. Progress of EMG median frequency.

Fig 8

Median frequency in a typical Intervention group participant (Subject 20), who received adaptive robotic assistance based on the detected muscle fatigue using EMG features. The doted regions represent a significant decrease in median frequency, which resulted in the detection of fatigue.