대한인간공학회지 (Journal of the Ergonomics Society of Korea)

  • 제32권3호
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  • Pages.273-278
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  • 2013
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  • 1229-1684(pISSN)
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  • 2093-8462(eISSN)
대한인간공학회 (Ergonomics Society of Korea)
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The Study of Muscle Fatigue and Risks of Musculoskeletal System Disorders from Text Inputting on a Smartphone

  • Ko, Kyung (Department of Physical Therapy, Gangnam-Gu Health Center) ;
  • Kim, Hee-Soo (Department of Occupational Therapy, Hallym Medical Center) ;
  • Woo, Ji-Hea (Department of Physical Therapy, Hallym College)
  • 투고 : 2013.01.18
  • 심사 : 2013.04.24
  • 발행 : 2013.06.30
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초록

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.

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참고문헌

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피인용 문헌

  1. The effects of smartphone use on upper extremity muscle activity and pain threshold vol.27, pp.6, 2015, https://doi.org/10.1589/jpts.27.1743
  2. Mobile Phone Use Pattern and Visual Display Terminal Syndrome Symptom Experience in Female Adolescents vol.16, pp.4, 2016, https://doi.org/10.5392/JKCA.2016.16.04.045
  3. Effects of sternocleidomastoid muscle and suboccipital muscle soft tissue release on muscle hardness and pressure pain of the sternocleidomastoid muscle and upper trapezius muscle in smartphone users with latent trigger points vol.97, pp.36, 2018, https://doi.org/10.1097/MD.0000000000012133