title: Effects of two workstation positions for below-knee assembly work on upper extremity muscle activity.
abstract: [Purpose] This study was performed to determine which set of below-knee working conditions minimizes upper extremity muscle activity and which of upward- or downward-direction workstations poses the greater risk of upper extremity disorder. [Subjects] The study population consisted of 15 young male workers. [Methods] EMG activities of the right anterior deltoid, biceps brachii, and lower trapezius muscles were measured in two below-knee assembly workstation positions. [Results] The anterior deltoid and biceps brachii muscle activities of Position 1 were significantly higher than those of Position 2. The lower trapezius muscle activity of Position 2 was significantly higher than that of Position 1. [Conclusion] Upward-direction workstations appear to pose a greater risk of upper extremity disorder than downward-direction workstations in below-knee assembly work.
authors: Department of Physical Therapy, Graduate School, Inje University, Republic of Korea.
authors: Seung-Je
authors: SJ
authors: Shin
authors: Department of Physical Therapy, College of Biomedical Science and Engineering, Inje University, Republic of Kore.
authors: Won-Gyu
authors: WG
authors: Yoo
keywords: Below knee assembly work; Electromyography; Upper extremity disorder
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