Changes in EMG during short duration supra maximal and long duration sub-maximal exercise: a comparative study

Surface electromyogram (sEMG) is a non-invasive recording of the underlying muscle activities. It is used as a measure of the force of contraction, and changes in sEMG are used as an indicator for localized muscle fatigue. This paper reports a study undertaken to determine the difference in the change of sEMG due to fatigue resulting from short time sprint cycling, and long duration cycling. This paper reports the results of the experimental study of the two kinds of exercises i.e. short duration (supra-maximal) and the long duration (sub-maximal). The results indicate that measure of the spectrum shift was effective in the detection of fatigue in supra-maximal dynamic contraction but was not useful for fatigue caused due to long duration sub-maximal cycling.