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Original Article
A Relationship between Cumulative Trauma Disorder and the Type of Workstations and Chairs in Workers with Repetitive Motion Tasks
Hyun Gi Jeong, Young Man Roh, Hyeon Woo Yim, Chung Yill Park, Chun Hwa Jeong
Korean Journal of Occupational and Environmental Medicine 2001;13(2):152-163.   Published online June 30, 2001
DOI: https://doi.org/10.35371/kjoem.2001.13.2.152
AbstractAbstract PDF
OBJECTIVES
The main purpose of this study was to investigate relationship between cumulative trauma disorders(CTDs) and the types of workstation and chair in workers with repetitive motion tasks.
METHODS
The study subjects were 77 repetitive motion tasks workers at small manufacturing industries in Seoul and Gyung-gi district area. A questionnaire was used to obtain about health practice for prevention and prevalence of CTDs by worker. The type of Workstations and chairs in workers were measured and analyzed with prevalence of CTDs by logistic regression.
RESULTS
Eighty-six percent of workers recognized that work posture was related to workstation and chair. Most employers and employees didn't follow the work practice guidelines for workers with repetitive motion tasks. The prevalence of CTDs was 64% by questionnaire. The prevalence of pain in shoulder, neck, back, and arm were 38%, 15%, 6%, and 5%, respectively, and the pain started after working an average duration of 16.5 months. The CTDs symptoms were significantly related to thickness of workstation, height of workstation, length of knee depth under workstation, height of back rest, height of seat pan, depth of sitting surface, width of sitting surface, and length from workstation surface edge to shoulder. By multiple regression analysis of each risk factor, prevalence of CTDs was highly correlated with height of back rest, height of seat pan, and depth of sitting surface.
CONCLUSIONS
This study suggests that workstations should be made adjustable for height and chairs should be equipped with seat pan height control, enough sitting surface for depth and width, back rest height and angle control. The workers should use the right working postures, exercise for health, occupational health education, and rest breaks and the manager of company should be educated for the preventing of CTDs.

Citations

Citations to this article as recorded by  
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  • Analysis of Electromyographic Activities of Erect Spinae at Different Height of Table during Ultrasound Therapy Work
    Chung-Yoo Kim, Jong-Ho Kang
    Journal of the Korean Society of Physical Medicine.2013; 8(3): 289.     CrossRef
  • Correlation Between the Height and the Subjective Discomfort Ratings and Muscle Performance at performing the Lower Arm's Pronation and Supination according to the Changes in Height of Working Table
    Kyung Tae Yoo, Jung Hyun Choi, Hee Jung Kim, Bom Lee, Jea Wook Jung, Wan Suk Choi, Young Dae Yun, Soon Hee Kim
    Journal of International Academy of Physical Therapy Research.2012; 3(2): 469.     CrossRef
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Original Article
Relationship between the Serum CPK and the Shoulder Muscle Disorder in VDT Workers
Soo Keun Kim, Hae Kwan Cheong
Korean Journal of Occupational and Environmental Medicine 1998;10(2):172-179.   Published online May 31, 1998
DOI: https://doi.org/10.35371/kjoem.1998.10.2.172
AbstractAbstract PDF
VDT workers are often exposed to static load in the shoulder stabilizing muscle due to repetitive work over long periods. Many investigations were reported the relationships between static load due to repetitive work and regional muscle disorder. However, diagnostic approach to work-related muscle disorder is difficult due to the absence of objective diagnostic tools. This study was performed to investigate the relationship between the serum CPK (creatine phosphokinase) concentrations and the shoulder muscle disorders. Results are as follow. 1. Mean serum CPK in total VDT workers was 67.6+/-28.4 IU/l and workers with abnormal serum CPK were 35 (21.5%). 2. Comparison between cases and controls did not show significant difference in the serum CPK level and the distribution of abnormal findings. 3. Sensitivity and specificity of the CPK test was 23.0% and 82.0%, respectively. Above results, in accordance with literatures, show that while serum CPK measure menu can be useful for the diagnosis of acute muscle injury, it does not adequately reflect the muscle disorders developed by the repetitive work of low tension over long time, such as VDT works.

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Ann Occup Environ Med : Annals of Occupational and Environmental Medicine
© Korean Society of Occupational & Environmental Medicine.
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