Fig. 1
Test windows for event detection of alternate activity among muscles. Two consecutive windows (Windowk−1, Window k ) are displayed for each muscle (LG lateral gastrocnemius, MG medial gastrocnemius, Sol soleus muscle). m Mean rsEMG [raw electromyogram (EMG) signals that had been amplified, full-wave rectified, and smoothed (time constant 300 ms)] level in the previous Window(k−1) with a period of 60 s. The threshold for the offset was set at 1/e while that of the onset was set at e time m (Window k ). Binary events detecting the active (ON) and inactive (OFF) periods are shown in the three muscles. The typical EMG overlap period is also shown (below left) See Statistical analysis for a detailed definition of parameters