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Bosch, Tim
Publications (3 of 3) Show all publications
Bosch, T., Mathiassen, S. E., De Looze, M., Hallman, D., Lyskov, E., Visser, B. & van Dieën, J. (2012). Fatigue, timing strategy and performance during prolonged repetitive work with interposed breaks. In: : . Paper presented at 4th International Conference on Applied Human Factors and Ergonomics, 21-25 July 2012, San Francisco, United States.
Open this publication in new window or tab >>Fatigue, timing strategy and performance during prolonged repetitive work with interposed breaks
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2012 (English)Conference paper, Published paper (Refereed)
National Category
Occupational Health and Environmental Health
Identifiers
urn:nbn:se:hig:diva-15372 (URN)
Conference
4th International Conference on Applied Human Factors and Ergonomics, 21-25 July 2012, San Francisco, United States
Available from: 2013-09-20 Created: 2013-09-20 Last updated: 2018-03-13Bibliographically approved
Bosch, T., Mathiassen, S. E., Hallman, D., De Looze, M., Lyskov, E., Visser, B. & van Dieën, J. (2012). Temporal strategy and performance during a fatiguing short-cycle repetitive task. Ergonomics, 55, 863-873
Open this publication in new window or tab >>Temporal strategy and performance during a fatiguing short-cycle repetitive task
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2012 (English)In: Ergonomics, ISSN 0014-0139, E-ISSN 1366-5847, Vol. 55, p. 863-873Article in journal (Refereed) Published
Abstract [en]

This study investigated temporal changes in movement strategy and performance during fatiguing short-cycle work. Eighteen participants performed six 7-minutes work blocks with repetitive reaching movements at 0.5 Hz, each followed by a 5.5-minute rest break for a total duration of one hour. Electromyography (EMG) was collected continuously from the upper trapezius muscle, the temporal movement strategy and timing errors were obtained on a cycle-to-cycle basis, and perceived fatigue was rated before and after each work block. Clear signs of fatigue according to subjective ratings and EMG manifestations developed within each work block, as well as during the entire hour. For most participants, timing errors gradually increased, as did the waiting time at the near target. Changes in temporal movement strategy were negatively correlated with changes in the level and variability of EMG, suggesting that an adaptive temporal strategy offset the development of unstable motor solutions in this fatiguing, short-cycle work

Keywords
Physical Fatigue, Physical Ergonomics, EMG, timing of movements
National Category
Occupational Health and Environmental Health
Identifiers
urn:nbn:se:hig:diva-8553 (URN)10.1080/00140139.2012.682739 (DOI)000306692100004 ()2-s2.0-84864564945 (Scopus ID)
Available from: 2011-03-11 Created: 2011-03-11 Last updated: 2018-03-13Bibliographically approved
Bosch, T., Mathiassen, S. E., Visser, B., De Looze, M. & van Dieën, J. (2011). The effect of work pace on workload, motor variability and fatigue during simulated light assembly work. Ergonomics, 54(2), 154-168
Open this publication in new window or tab >>The effect of work pace on workload, motor variability and fatigue during simulated light assembly work
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2011 (English)In: Ergonomics, ISSN 0014-0139, E-ISSN 1366-5847, Vol. 54, no 2, p. 154-168Article in journal (Refereed) Published
Abstract [en]

This study investigated the effect of work pace on workload, motor variability and fatigue during light assembly work. Upper extremity kinematics and electromyography (EMG) were obtained on a cycle-to-cycle basis for eight participants during two conditions, corresponding to "normal" and "high" work pace according to a predetermined time system for engineering. Indicators of fatigue, pain sensitivity and performance were recorded before, during and after the task. The level and variability of muscle activity did not differ according to work pace, and manifestations of muscle fatigue or changed pain sensitivity were not observed. In the high work pace, however, participants moved more efficiently, they showed more variability in wrist speed and acceleration, but they also made more errors. These results suggest that an increased work pace, within the range addressed here, will not have any substantial adverse effects on acute motor performance and fatigue in light, cyclic assembly work. STATEMENT OF RELEVANCE: In the manufacturing industry, work pace is a key issue in production system design and hence of interest to ergonomists as well as engineers. In this laboratory study, increasing the work pace did not show adverse effects in terms of biomechanical exposures and muscle fatigue, but it did lead to more errors. For the industrial engineer, this observation suggests that an increase in work pace might diminish production quality, even without any noticeable fatigue being experienced by the operators.

Keywords
Industrial ergonomics, Variability, Electromyography, Fatigue, Kinematics
Identifiers
urn:nbn:se:hig:diva-7867 (URN)10.1080/00140139.2010.538723 (DOI)000286926600005 ()21294013 (PubMedID)2-s2.0-79551622173 (Scopus ID)
Available from: 2010-10-26 Created: 2010-10-26 Last updated: 2018-03-13Bibliographically approved
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