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The Study of Muscle Fatigue and Risks of Musculoskeletal System Disorders from Text Inputting on a Smartphone
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 Title & Authors
The Study of Muscle Fatigue and Risks of Musculoskeletal System Disorders from Text Inputting on a Smartphone
Ko, Kyung; Kim, Hee-Soo; Woo, Ji-Hea;
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 Abstract
Objective: This study aims to analyze and evaluate fatigue in upper trapezius muscles of adults when inputting text on a smart phone, thereby examining the risk of cumulative trauma disorders in the musculoskeletal system of the upper extremity. Method: Forty-five healthy adults were divided equally into three groups: a smartphone group, a notebook group, and a desktop group. A surface electromyogram was placed on the upper trapezius muscle of each participant, after which they inputted text for ten minutes within an ergonomic setting; their side posture was recorded on video and analyzed. Results: The spectral edge frequency values for the smartphone group, as recorded from the upper right trapezius muscles on the surface electromyogram, showed a significant decrease(p<.05). Regarding the RULA, all three groups had results indicating "action level 2". Conclusion: All three groups had results indicating "action level 2" according to the RULA, which means that additional research on the posture of the participants while performing tasks is necessary, and their posture needs to be corrected. In particular, the smartphone group has the highest levels of fatigue in the upper trapezius muscles, suggesting that the task of inputting text on a smartphone is a high risk for causing cumulative trauma disorders.
 Keywords
Muscle fatigue Smart phone;RULA;Video display terminal(VDT) syndrome;
 Language
Korean
 Cited by
1.
목 주위 근육 통증 여부에 따른 스마트폰 사용이 근 피로도와 통증, 목뼈운동범위에 미치는 영향,소윤지;우영근;

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Mobile Phone Use Pattern and Visual Display Terminal Syndrome Symptom Experience in Female Adolescents, The Journal of the Korea Contents Association, 2016, 16, 4, 45  crossref(new windwow)
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