Deal all,
I have sEMG data for triceps push-down exercise. the data was recorded throughout the duration of cycle. I want to separate the concentric and eccentric phases, and the condition is I don't have any kinematics information (no video recording or any other biomechanic information).
During our pilot testing, i recorded few videos and checked for phase (eccentric or concentric) detection. I found that the there is clear indication of transition (after zooming in one cycle on 22 inch computer screen) from concentric to eccentric phase. Further, from RMS plot, transition from concentric to eccentric phase is clearly visible from steep drop in the RMS value. attached figures show the scenario.
Both the video data and the visual segmentation nearly always matched (with difference of 15 to 30ms) for our pilot testing. So, I decided not to record the video as it increase the complexity. Is it a coincidence that in those pilot cases, the change in phase and video record happen to be at the same time? Can the concentric and eccentric phases be separated like this i.e. without any information on kinematics?