Journal article
The effect of overhead drilling position on shoulder moment and electromyography
Ergonomics, Vol.44(5), pp.489-501
04/01/2001
DOI: 10.1080/00140130120079
PMID: 11345492
Abstract
The effect of overhead drilling tasks on electromyographic (EMG) activity and shoulder joint moment was examined in this study. Twenty subjects simulated an overhead drilling task using a close, middle and far reach position while standing on either a lower or a higher step of a stepladder. Root mean square amplitude (AMP) of EMG activity from the dominant side anterior deltoid, biceps brachii and triceps brachii muscles was used to determine muscular load. Digital video was used to determine shoulder joint moment using 2-dimensional static link segment modelling in the sagittal plane. The results demonstrated that, compared to the far reach position, using the close reach position significantly decreased anterior deltoid AMP and biceps brachii AMP and moment, but increased triceps brachii AMP. Compared to the lower step, using the higher step significantly decreased anterior deltoid AMP and triceps AMP and moment, while increasing biceps AMP in the close position. There was no significant change noted in EMG median frequency indicating that fatigue was minimized. Moment increased monotonically with AMP. The findings indicated that workers performing overhead tasks should work close to their body in order to minimize shoulder forces. The implications of this recommendation are discussed.
Details
- Title: Subtitle
- The effect of overhead drilling position on shoulder moment and electromyography
- Creators
- Dan Anton - Biomechanics and Ergonomics Facility, 100 Oakdale Campus, 156D IREH, The University of Iowa, Iowa 52242, USALee D Shibley - Physical Therapy Graduate Program, The University of Iowa, Iowa 52242, USANathan B Fethke - Research and Development, Fiskars Inc., 2219 Eagle Dr., Middleton, Wisconsin 53562, USAJennifer Hess - Department of Exercise and Movement Science, The University of Oregon, Eugene, Oregon 97403, USAThomas M Cook - College of Public Health, The University of Iowa, Iowa 52242, USAJohn Rosecrance - College of Public Health, The University of Iowa, Iowa 52242, USA
- Resource Type
- Journal article
- Publication Details
- Ergonomics, Vol.44(5), pp.489-501
- DOI
- 10.1080/00140130120079
- PMID
- 11345492
- NLM abbreviation
- Ergonomics
- ISSN
- 0014-0139
- eISSN
- 1366-5847
- Publisher
- Taylor & Francis Group
- Language
- English
- Date published
- 04/01/2001
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Occupational and Environmental Health; International Programs; Industrial and Systems Engineering; Physical Therapy and Rehabilitation Science; Injury Prevention Research Center
- Record Identifier
- 9983997324802771
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