2.3.1. Objective index measurement.
CONTRACTION
Surface electromyographic eigenvalues: 2 main aspects, maximum value (MAX), and root mean square value (RMS). MAX reflects the maximum contraction strength of the measured muscle. RMS is the root mean square of the EMG transient amplitude over time, which reflects the average change in EMG signal and is therefore used as an evaluation of muscle contraction performance. Surface EMG acquisition is shown in Figure Surface EMG collection.