Extraction of main factors affecting muscle fatigue in lower-limb rehabilitation

This study extracted the main factors from a questionnaire, measurement results, and the analysis of sEMG signals to establish a method of evaluating muscle fatigue. Three measured factors (rating of perceived exertion, heart rate, mileage) and five factors obtained from the analysis of sEMG signals (root mean square, mean absolute value, variance, times of zero crossing, median frequency) were collected. After the F-test, the correlation analysis, and the principal component analysis, we finally extracted six factors as the main factors that have a big influence on muscle fatigue.