Fig. 1
From: Effects of various walking intensities on leg muscle fatigue and plantar pressure distributions
The short-time Fourier transform for muscle fatigue quantification during walking. A The raw data of EMG signal (A) is filtered by a band pass filter as the filtered signal (B). C The signal was extracted using the window sequence w[n] of length L, with shift (r) of R samples. D Estimation of the median frequency using the windowed sequence, and the average values of the median frequency were calculated under 6 walking conditions