A study on muscle fatigue associated with awkward posture among workers in aerospace industry
In aerospace industry, many tasks required manufacturing workers to perform their works in awkward posture. Awkward posture is a practical working posture when joints are not in neutral position such as lifting heavy products, reaching materials, bending forward their back when doing jobs, and pu...
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| Main Authors: | , |
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| Format: | Article |
| Language: | en |
| Published: |
Trans Tech Publications, Switzerland
2013
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| Subjects: | |
| Online Access: | http://eprints.utem.edu.my/id/eprint/13987/1/A_Study_on_Muscel_Fatigue_Associated_with_Awkward_Psoture_Among_Workers_In_Aerospace_Industry_2013.pdf http://eprints.utem.edu.my/id/eprint/13987/ |
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| Summary: | In aerospace industry, many tasks required manufacturing workers to perform their works
in awkward posture. Awkward posture is a practical working posture when joints are not in neutral
position such as lifting heavy products, reaching materials, bending forward their back when doing
jobs, and pushing or pulling excessive loads because those tasks require a stable position and large
degree of freedom. If the workers perform the jobs continuously in awkward posture throughout the
working hours, they may be experience muscle fatigue. The objective of this study is to measure the
myoelectric level (μV) exerted by the right and left thoracolumbar fascia muscles while workers
perform the lay-up process in aerospace industry. The myoelectric level in the muscles was
measured using surface Electromyography (sEMG) measurement. Six production workers from
aerospace industry participated as subjects. The muscle fatigue of the subjects was measured during
beginning until finish of lay-up process. This measuring activity has been doing from Wednesday to
Friday. Highest results of myoelectric level for right thoracolumbar fascia is when the workers
make the lay-up process for ply seven until ply eleven. Different with the results of myoelectric
level for left thoracolumbar fascia which is; three of the workers got highest result when they are
making the lay-up process for ply seven until ply eleven, but the other three of the workers got
highest result when they are making the lay-up process for ply twelve. Nevertheless, after averaging
both of the results, a mean result for each worker shows the highest myoelectric level is when the
workers make the lay-up process for ply seven until ply eleven. According to the mean, a
percentage of worse tasks are projected. Based on this study, the authors concluded that muscle
fatigue of the lay-up workers in aerospace industry was influenced by the work load, work activity
and duration of awkward posture. |
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