VDT 작업에서 두부전방자세 위험수준에 따른 목의 피로와 Flexion-Relaxation 변수에 관한 연구 (Study of Neck Fatigue and Flexion-Relaxation Parameters Associated with Forward Head Posture (FHP) Risk Level in VDT Works)

서지정보

· 발행기관 : 대한인간공학회
· 수록지 정보 : 대한인간공학회지 / 37권 / 6호 / 667 ~ 679페이지
· 저자명 : 공용구, 최경희, 신재민, 김재경, 심현호, 조민욱, 이주희

초록

Objective: The aim of this study is to quantify the neck fatigue of the office worker in Visual Display Terminal (VDT) work using the parameters of the flexion-relaxation phenomenon.
Background: VDT work comprises a large proportion of the office worker' tasks.
Although VDT work requires relatively less loads, it can stress the neck and shoulders of the workers who work for a long period time with awkward sitting postures. In spite of that many office workers are suffering from neck and shoulder pains, the current solution for musculoskeletal disorders of office workers is only a management approach. Thus, it is important to precisely quantify the fatigue of VDT workers for reducing the prevalence of musculoskeletal disorders in office workers and for improving working environment.
Method: For this experiment, 23 males were recruited to compare flexion-relaxation parameters such as Flexion-Relaxation Ratio (FRR) and On/Offset angle, and subjective discomfort (Borg CR-10 scale) before and after VDT task during 50 minutes. Participants were divided into two groups (forward head posture (FHP) high risk group and FHP low risk group) based on the pre-FHP test.
Results: FRP parameters changed after VDT task. The FRR was significantly decreased and On/Offset angles showed an increasing trend after the task. CVA was slightly lower in FHP high risk group during 50 minute of VDT task. Using this result, it was found that high risk group of FHP was maintained at a lower posture for a long time.
In addition, the subjective discomfort also increased after task.
Conclusion: Based on these results, VDT work causes fatigue to the worker. And this fatigue can be quantified using FRP parameters. In addition, it was confirmed that FRR can be used as an index to confirm the abnormality of neck.
Application: These results can be used to quantify the fatigue caused by VDT work in office workers, and to further validate the improvement of musculoskeletal disorders.

영어초록

Objective: The aim of this study is to quantify the neck fatigue of the office worker in Visual Display Terminal (VDT) work using the parameters of the flexion-relaxation phenomenon.
Background: VDT work comprises a large proportion of the office worker' tasks.
Although VDT work requires relatively less loads, it can stress the neck and shoulders of the workers who work for a long period time with awkward sitting postures. In spite of that many office workers are suffering from neck and shoulder pains, the current solution for musculoskeletal disorders of office workers is only a management approach. Thus, it is important to precisely quantify the fatigue of VDT workers for reducing the prevalence of musculoskeletal disorders in office workers and for improving working environment.
Method: For this experiment, 23 males were recruited to compare flexion-relaxation parameters such as Flexion-Relaxation Ratio (FRR) and On/Offset angle, and subjective discomfort (Borg CR-10 scale) before and after VDT task during 50 minutes. Participants were divided into two groups (forward head posture (FHP) high risk group and FHP low risk group) based on the pre-FHP test.
Results: FRP parameters changed after VDT task. The FRR was significantly decreased and On/Offset angles showed an increasing trend after the task. CVA was slightly lower in FHP high risk group during 50 minute of VDT task. Using this result, it was found that high risk group of FHP was maintained at a lower posture for a long time.
In addition, the subjective discomfort also increased after task.
Conclusion: Based on these results, VDT work causes fatigue to the worker. And this fatigue can be quantified using FRP parameters. In addition, it was confirmed that FRR can be used as an index to confirm the abnormality of neck.
Application: These results can be used to quantify the fatigue caused by VDT work in office workers, and to further validate the improvement of musculoskeletal disorders.

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