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Sensors 2010, 10(5), 4838-4854; doi:10.3390/s100504838

Novel Feature Modelling the Prediction and Detection of sEMG Muscle Fatigue towards an Automated Wearable System

School of Computer Science and Electronic Engineering, University of Essex-Wivenhoe Park, Colchester CO4 3SQ, UK
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Received: 22 April 2010 / Revised: 28 April 2010 / Accepted: 7 May 2010 / Published: 12 May 2010
(This article belongs to the Section Chemical Sensors)
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Abstract

Surface Electromyography (sEMG) activity of the biceps muscle was recorded from ten subjects performing isometric contraction until fatigue. A novel feature (1D spectro_std) was used to extract the feature that modeled three classes of fatigue, which enabled the prediction and detection of fatigue. Initial results of class separation were encouraging, discriminating between the three classes of fatigue, a longitudinal classification on Non-Fatigue and Transition-to-Fatigue shows 81.58% correct classification with accuracy 0.74 of correct predictions while the longitudinal classification on Transition-to-Fatigue and Fatigue showed lower average correct classification of 66.51% with a positive classification accuracy 0.73 of correct prediction. Comparison of the 1D spectro_std with other sEMG fatigue features on the same dataset show a significant improvement in classification, where results show a significant 20.58% (p < 0.01) improvement when using the 1D spectro_std to classify Non-Fatigue and Transition-to-Fatigue. In classifying Transition-to-Fatigue and Fatigue results also show a significant improvement over the other features giving 8.14% (p < 0.05) on average of all compared features.
Keywords: sEMG feature extraction; muscle fatigue; 1D spectro; 1D spectro_std; Transition-to-Fatigue; peripheral fatigue sEMG feature extraction; muscle fatigue; 1D spectro; 1D spectro_std; Transition-to-Fatigue; peripheral fatigue
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Al-Mulla, M.R.; Sepulveda, F. Novel Feature Modelling the Prediction and Detection of sEMG Muscle Fatigue towards an Automated Wearable System. Sensors 2010, 10, 4838-4854.

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