[A field study on the work load and muscle fatigue at neck-shoulder in female sewing machine operators by using surface electromyography].
Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi
; 29(3): 171-5, 2011 Mar.
Article
en Zh
| MEDLINE
| ID: mdl-21619811
ABSTRACT
OBJECTIVE:
To study neck and shoulder work-related muscle fatigue of female sewing machine operators.METHODS:
18 health female sewing machine operators without musculoskeletal disorders work in Beijing garment industry factory as volunteers in participate of this study. The maximal voluntary contraction (MVC) and 20% MVC of bilateral upper trapezium and cervical erectors spinae was tested before sewing operations, then the whole 20 time windows (1 time window = 10 min) sewing machine operations was monitored and the surface electromyography (sEMG) signals simultaneously was recorded after monitoring the 20%MVC was tested. Use amplitude analysis method to reduction recorded EMG signals.RESULTS:
During work, the median load for the left cervical erector spinae (LCES), right cervical erector spinae (RCES), left upper trapezium (LUT) and right upper trapezium (RUT) respectively was 6.78 ± 1.05, 6.94 ± 1.12, 5.68 ± 2.56 and 6.47 ± 3.22, work load of right is higher than the left; static load analysis indicated the value of RMS(20%MVC) before work was higher than that value after work, the increase of right CES and UT RMS(20%MVC) was more; the largest 20%MVE of bilateral CES occurred at 20th time window, and that of bilateral UT happened at 16th.CONCLUSIONS:
The work load of female sewing machine operators is sustained "static" load, and work load of right neck-shoulder is higher than left, right neck-shoulder muscle is more fatigable and much serious once fatigued.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Hombro
/
Industria Textil
/
Fatiga Muscular
Límite:
Adult
/
Female
/
Humans
Idioma:
Zh
Revista:
Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi
Asunto de la revista:
MEDICINA OCUPACIONAL
Año:
2011
Tipo del documento:
Article
País de afiliación:
China