Electromyographical manifestations of muscle fatigue during different levels of simulated light manual assembly work

T. Bosch, M.P. de Looze, I. Kingma, B. Visser, J.H. van Dieen

    Research output: Contribution to JournalArticleAcademicpeer-review

    Abstract

    The purpose of this study was to determine whether objective electromyographical manifestations of muscle fatigue develop in the upper trapezius muscle in two assembly tasks involving contractions of different low-intensity levels (8% and 12% MVC) and whether these indications of fatigue are homogeneously distributed across different muscle parts. Ten subjects performed an assembly task for 3 h. EMG was recorded using four pairs of bipolar electrodes over the left and right trapezius muscles during the task itself and during isometric test contractions. Both recordings (during task and test) showed a significant decrease in the mean power frequency (MPF), at both intensity levels while the amplitude remained constant. A regression analysis showed significantly different temporal patterns for the MPF decrease for the two intensities. No differences in manifestations of muscle fatigue development were found between different parts of the muscle. These results indicate that in a highly repetitive low-intensity task, electromyographical manifestations of muscle fatigue can be observed from signals recorded in the task itself. Furthermore, the rate of development of fatigue manifestations was different between the two assembly tasks. This fatigue development appeared to be homogenous across the muscle. © 2008 Elsevier Ltd. All rights reserved.
    LanguageEnglish
    Pagese246-256
    JournalJournal of Electromyography and Kinesiology
    Volume19
    Issue number4
    DOIs
    Publication statusPublished - 2009

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    Muscle Fatigue
    Fatigue
    Superficial Back Muscles
    Light
    Muscles
    Isometric Contraction
    Muscle Development
    Electrodes
    Regression Analysis

    Cite this

    @article{210383edcfd742979a3edb3d3b4a5981,
    title = "Electromyographical manifestations of muscle fatigue during different levels of simulated light manual assembly work",
    abstract = "The purpose of this study was to determine whether objective electromyographical manifestations of muscle fatigue develop in the upper trapezius muscle in two assembly tasks involving contractions of different low-intensity levels (8{\%} and 12{\%} MVC) and whether these indications of fatigue are homogeneously distributed across different muscle parts. Ten subjects performed an assembly task for 3 h. EMG was recorded using four pairs of bipolar electrodes over the left and right trapezius muscles during the task itself and during isometric test contractions. Both recordings (during task and test) showed a significant decrease in the mean power frequency (MPF), at both intensity levels while the amplitude remained constant. A regression analysis showed significantly different temporal patterns for the MPF decrease for the two intensities. No differences in manifestations of muscle fatigue development were found between different parts of the muscle. These results indicate that in a highly repetitive low-intensity task, electromyographical manifestations of muscle fatigue can be observed from signals recorded in the task itself. Furthermore, the rate of development of fatigue manifestations was different between the two assembly tasks. This fatigue development appeared to be homogenous across the muscle. {\circledC} 2008 Elsevier Ltd. All rights reserved.",
    author = "T. Bosch and {de Looze}, M.P. and I. Kingma and B. Visser and {van Dieen}, J.H.",
    year = "2009",
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    language = "English",
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    Electromyographical manifestations of muscle fatigue during different levels of simulated light manual assembly work. / Bosch, T.; de Looze, M.P.; Kingma, I.; Visser, B.; van Dieen, J.H.

    In: Journal of Electromyography and Kinesiology, Vol. 19, No. 4, 2009, p. e246-256.

    Research output: Contribution to JournalArticleAcademicpeer-review

    TY - JOUR

    T1 - Electromyographical manifestations of muscle fatigue during different levels of simulated light manual assembly work

    AU - Bosch, T.

    AU - de Looze, M.P.

    AU - Kingma, I.

    AU - Visser, B.

    AU - van Dieen, J.H.

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    N2 - The purpose of this study was to determine whether objective electromyographical manifestations of muscle fatigue develop in the upper trapezius muscle in two assembly tasks involving contractions of different low-intensity levels (8% and 12% MVC) and whether these indications of fatigue are homogeneously distributed across different muscle parts. Ten subjects performed an assembly task for 3 h. EMG was recorded using four pairs of bipolar electrodes over the left and right trapezius muscles during the task itself and during isometric test contractions. Both recordings (during task and test) showed a significant decrease in the mean power frequency (MPF), at both intensity levels while the amplitude remained constant. A regression analysis showed significantly different temporal patterns for the MPF decrease for the two intensities. No differences in manifestations of muscle fatigue development were found between different parts of the muscle. These results indicate that in a highly repetitive low-intensity task, electromyographical manifestations of muscle fatigue can be observed from signals recorded in the task itself. Furthermore, the rate of development of fatigue manifestations was different between the two assembly tasks. This fatigue development appeared to be homogenous across the muscle. © 2008 Elsevier Ltd. All rights reserved.

    AB - The purpose of this study was to determine whether objective electromyographical manifestations of muscle fatigue develop in the upper trapezius muscle in two assembly tasks involving contractions of different low-intensity levels (8% and 12% MVC) and whether these indications of fatigue are homogeneously distributed across different muscle parts. Ten subjects performed an assembly task for 3 h. EMG was recorded using four pairs of bipolar electrodes over the left and right trapezius muscles during the task itself and during isometric test contractions. Both recordings (during task and test) showed a significant decrease in the mean power frequency (MPF), at both intensity levels while the amplitude remained constant. A regression analysis showed significantly different temporal patterns for the MPF decrease for the two intensities. No differences in manifestations of muscle fatigue development were found between different parts of the muscle. These results indicate that in a highly repetitive low-intensity task, electromyographical manifestations of muscle fatigue can be observed from signals recorded in the task itself. Furthermore, the rate of development of fatigue manifestations was different between the two assembly tasks. This fatigue development appeared to be homogenous across the muscle. © 2008 Elsevier Ltd. All rights reserved.

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