- Volume 31 Issue 4
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Effects of Combinational Posture of Shoulder, Elbow and Wrist on Grip Strength and Muscle Activity
어깨, 팔꿈치, 손목의 자세에 따른 최대악력과 근육활동에 관한 연구
- Kim, Tae Hyung (Department of Safety Engineering, Pukyong National University) ;
- Jung, Seung Rae (Department of Safety Engineering, Pukyong National University) ;
- Kang, Sung Sik (Department of Safety Engineering, Pukyong National University) ;
- Chang, Seong Rok (Department of Safety Engineering, Pukyong National University)
- Received : 2016.01.22
- Accepted : 2016.05.20
- Published : 2016.08.31
This study aimed to analyze postures that were frequently conducted in manufacturing industry. To find grip strength and muscle activities of each posture, Maximum Voluntary Contraction (MVC) and ElectroMyoGraphy (EMG) were measured. Based on the results of this study, the most appropriate posture could be suggested and used as a basic information for preventing musculoskeletal disorders. Most work-related musculoskeletal disorders have been occurred in the fields of manufacturing industry. According to previous studies, it was reported that the rate of musculoskeletal diseases of upper extremity was higher than that of other body parts. Accordingly, there were many studies about discomfort and grip strength of upper extremity. However, these studies dealt with single selection of wrist, elbow and shoulder. So, it was insufficient for comprehensive studies about upper extremity. And in order to improve the work posture, the physiological changes being generated by the combination of wrist, elbow and shoulder postures should be observed and analyzed. In order to conduct this study, thirty university students who had no records of MSDs involved were recruited. Independent variables were postures of wrist(pronation, neutral, supination), postures of elbow(flexion
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