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Effects of work surface height on muscle activity and posture of the upper extremity during simulated pipetting.

Authors
Park-J-K; Buchholz-B
Source
Ergonomics 2013 Jul; 56(7):1147-1158
NIOSHTIC No.
20044012
Abstract
In order to examine the effects of work surface height (WSH) on muscle activity, posture and discomfort during simulated pipetting, an experimental study was conducted using electromyography, electrogoniometry, video techniques and also qualitative data. The experimental design consisted of one independent variable (WSH with six heights) and 13 dependent variables. The levels of muscle strain and discomfort were significantly lower at the shoulder when the WSHs were low but thumb muscle activities and neck flexion levels were markedly higher at these WSHs compared to higher WSHs. To reduce shoulder strain, without raising thumb and neck strain beyond acceptable limits, the findings suggest that the height of a laboratory workbench should be at the level of the pipette tip when held in a standing position with the hand at elbow height. It was also found that pipetting should not be done in a seated posture. PRACTITIONER SUMMARY: An experimental study was conducted to examine the effects of work surface height on upper extremity muscle activity, posture and discomfort during simulated pipetting. The findings suggest that the laboratory workbench height should be at the pipette-tip level when held in a standing position with the hand at elbow height.
Keywords
Ergonomics; Musculoskeletal-system-disorders; Extremities; Work-areas; Workplace-studies; Height-factors; Biomechanics; Muscle-function; Posture; Simulation-methods; Muscle-physiology; Psychological-responses; Psychological-testing; Skeletal-stress; Human-factors-engineering; Humans; Men; Women; Equipment-design; Electrophysiological-examinations; Electrophysiological-measurements; Laboratory-equipment; Laboratory-work; Laboratory-workers; Author Keywords: work surface height; muscle activity; posture; discomfort; pipetting
Contact
Jung-Keun Park, Department of Work Environment, University of Massachusetts Lowell, 1 University Ave., Lowell, MA 01854, USA
CODEN
ERGOAX
Publication Date
20130701
Document Type
Journal Article
Email Address
ergo.jkpark@gmail.com
Funding Type
Grant
Fiscal Year
2013
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-T42-OH-008416
Issue of Publication
7
ISSN
0014-0139
Source Name
Ergonomics
State
MA
Performing Organization
Harvard School of Public Health
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