The EMG is an important tool in the assessment of muscle activities in various occupational tasks, only if used properly. The recordings, processing and interpretation of the EMG should be done while considering the proper electrodes size, interelectrodes distance, muscle architecture, contraction rate, motor units recruitment pattern, muscle length, cross-talk from nearby muscles, sampling rate, filter bandwidths, and smoothing time constants. Each of the above factors, if not considered, can introduce substantial error and result in false or misleading interpretation.
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