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Ergonomics Publication details, including instructions for authors and subscription information: http://www.tandfonline.com/loi/terg20
Electromyographic fatigue in neck/shoulder muscles and endurance in women with repetitive work a
a
a
a
GERT-ÅKE HANSSON , ULF STRÖMBERG , BRITT LARSSON , KERSTINA OHLSSON , ISTVAN a
BALOGH & ULRICH MORITZ
b
a
Departments of Occupational and Environmental Medicine , University Hospital , Lund, S-221 85, Sweden b
Physical Therapy , University Hospital , Lund, S-221 85, Sweden Published online: 30 May 2007.
To cite this article: GERT-ÅKE HANSSON , ULF STRÖMBERG , BRITT LARSSON , KERSTINA OHLSSON , ISTVAN BALOGH & ULRICH MORITZ (1992) Electromyographic fatigue in neck/shoulder muscles and endurance in women with repetitive work, Ergonomics, 35:11, 1341-1352, DOI: 10.1080/00140139208967397 To link to this article: http://dx.doi.org/10.1080/00140139208967397
PLEASE SCROLL DOWN FOR ARTICLE Taylor & Francis makes every effort to ensure the accuracy of all the information (the “Content”) contained in the publications on our platform. However, Taylor & Francis, our agents, and our licensors make no representations or warranties whatsoever as to the accuracy, completeness, or suitability for any purpose of the Content. Any opinions and views expressed in this publication are the opinions and views of the authors, and are not the views of or endorsed by Taylor & Francis. The accuracy of the Content should not be relied upon and should be independently verified with primary sources of information. Taylor and Francis shall not be liable for any losses, actions, claims, proceedings, demands, costs, expenses, damages, and other liabilities whatsoever or howsoever caused arising directly or indirectly in connection with, in relation to or arising out of the use of the Content. This article may be used for research, teaching, and private study purposes. Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden. Terms & Conditions of access and use can be found at http:// www.tandfonline.com/page/terms-and-conditions
Electromyographic fatigue in neck/shoulder muscles and endurance in women with repetitive work G ERT- AKEHANSSON, U LF STR~MBERG, B ~ r rLARSSON, r KERSTINA OHLSSON, IWAN B A ~ and H UWCHM o m *
Downloaded by [Carnegie Mellon University] at 19:52 13 October 2014
Departments of Occupational and Environmental Medicine and *Physical Therapy, University Hospital, S-22 1 85 Lund, Sweden Keywords: Electromyography; Fatigue; Isometric contraction; Endurance; Isotonic regression analysis; Human engineering.
EMG was recorded with surface electrodes from the trapezius and deltoid muscles during a static endurance test at approximately 20% of maximal voluntary contraction. Objective parameters for localized muscular fatigue were derived from the time course of the root mean square (RMS) and mean power frequency (MPF) of the EMG recordings. Isotonic regression is introduced as a tool for assessment of such parameters. The most pronounced sign of fatigue for trapezius was an increase in the R M S values, while for deltoid it was a decrease in the MPF values. This could be explained by the different functions of the two muscles. The endurance time for a group of I 1 women in indus~rialwork with repe~itiveshortcycled work tasks who were diagnosed with necWshoulder disorders (tension neck) was significantly shorter @
Ergonomics Publication details, including instructions for authors and subscription information: http://www.tandfonline.com/loi/terg20
Electromyographic fatigue in neck/shoulder muscles and endurance in women with repetitive work a
a
a
a
GERT-ÅKE HANSSON , ULF STRÖMBERG , BRITT LARSSON , KERSTINA OHLSSON , ISTVAN a
BALOGH & ULRICH MORITZ
b
a
Departments of Occupational and Environmental Medicine , University Hospital , Lund, S-221 85, Sweden b
Physical Therapy , University Hospital , Lund, S-221 85, Sweden Published online: 30 May 2007.
To cite this article: GERT-ÅKE HANSSON , ULF STRÖMBERG , BRITT LARSSON , KERSTINA OHLSSON , ISTVAN BALOGH & ULRICH MORITZ (1992) Electromyographic fatigue in neck/shoulder muscles and endurance in women with repetitive work, Ergonomics, 35:11, 1341-1352, DOI: 10.1080/00140139208967397 To link to this article: http://dx.doi.org/10.1080/00140139208967397
PLEASE SCROLL DOWN FOR ARTICLE Taylor & Francis makes every effort to ensure the accuracy of all the information (the “Content”) contained in the publications on our platform. However, Taylor & Francis, our agents, and our licensors make no representations or warranties whatsoever as to the accuracy, completeness, or suitability for any purpose of the Content. Any opinions and views expressed in this publication are the opinions and views of the authors, and are not the views of or endorsed by Taylor & Francis. The accuracy of the Content should not be relied upon and should be independently verified with primary sources of information. Taylor and Francis shall not be liable for any losses, actions, claims, proceedings, demands, costs, expenses, damages, and other liabilities whatsoever or howsoever caused arising directly or indirectly in connection with, in relation to or arising out of the use of the Content. This article may be used for research, teaching, and private study purposes. Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden. Terms & Conditions of access and use can be found at http:// www.tandfonline.com/page/terms-and-conditions
Electromyographic fatigue in neck/shoulder muscles and endurance in women with repetitive work G ERT- AKEHANSSON, U LF STR~MBERG, B ~ r rLARSSON, r KERSTINA OHLSSON, IWAN B A ~ and H UWCHM o m *
Downloaded by [Carnegie Mellon University] at 19:52 13 October 2014
Departments of Occupational and Environmental Medicine and *Physical Therapy, University Hospital, S-22 1 85 Lund, Sweden Keywords: Electromyography; Fatigue; Isometric contraction; Endurance; Isotonic regression analysis; Human engineering.
EMG was recorded with surface electrodes from the trapezius and deltoid muscles during a static endurance test at approximately 20% of maximal voluntary contraction. Objective parameters for localized muscular fatigue were derived from the time course of the root mean square (RMS) and mean power frequency (MPF) of the EMG recordings. Isotonic regression is introduced as a tool for assessment of such parameters. The most pronounced sign of fatigue for trapezius was an increase in the R M S values, while for deltoid it was a decrease in the MPF values. This could be explained by the different functions of the two muscles. The endurance time for a group of I 1 women in indus~rialwork with repe~itiveshortcycled work tasks who were diagnosed with necWshoulder disorders (tension neck) was significantly shorter @
