Journal of the Korean Society of Physical Medicine (대한물리의학회지)

The Korean Society of Physical Medicine (대한물리의학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of Distance Between Trunk and Desk on Forward Head Posture and Muscle Activity of Neck and Shoulder Muscles During Computer Work

컴퓨터 작업시 책상과 체간사이 거리가 전방 머리 자세와 목과 어깨 근육들의 근 활성도에 미치는 영향

  • Lee, Won-Hwee (Department of Physical Therapy, Vision University, College of Jeonju)
  • 이원휘 (전주비전대학교 물리치료학과)
  • Received : 2013.09.26
  • Accepted : 2013.10.31
  • Published : 2013.11.30
Download PDF
⟨ Previous Next ⟩

Abstract

PURPOSE: The purpose of this study was to investigate the effect of distance between trunk and desk on forward head posture and muscle activity of neck and shoulder muscles during computer work. METHODS: Twenty subjects who have healthy conditions were asked to perform computer work in two conditions (distance between trunk and desk was 0 and 15 cm). Forward head angle was analyzed with a SIMI motion analysis system. Surface electromyography recorded the upper trapezius and splenius capitis muscles. The significance of differences in distance between trunk and desk (0cm and 15cm) was tested by paired t-test. The alpha level was set at .05. RESULTS: The results showed that the change of forward head angle was significantly higher during the computer work when the distance between trunk and desk was 15cm than 0cm. The muscle activity of upper trapezius and splenius capitis was also significantly higher during the computer work when the distance between trunk and desk was 15cm than 0cm. CONCLUSION: Our study suggest that the distance between trunk and desk was should minimized for prevention of forward head posture during computer work.

Keywords

References

  1. Babski-Reeves K, Stanfield J, Hughes L. Assessment of video display workstation set up on risk factors associated with the development of low back and neck discomfort. Int J Ind Ergon. 2005;35:593-604. https://doi.org/10.1016/j.ergon.2005.01.006
  2. Burgess-Limerick R, Plooy A, Ankrum DR. The effect of imposed and self-selected computer monitor height on posture and gaze angle. Clin Biomech. 1998;13(8):584-92. https://doi.org/10.1016/S0268-0033(98)00021-7
  3. Caneiro JP, O'Sullivan P, Burnett A, et al. The influence of different sitting postures on head/neck posture and muscle activity. Man Ther. 2010;15(1):54-60. https://doi.org/10.1016/j.math.2009.06.002
  4. Chiou WK, Chou WY, Chen BH. Notebook computer use with different monitor tilt angle: effects on posture, muscle activity and discomfort of neck pain users. Work. 2012;41(Suppl):2591-5.
  5. Chiu TT, Ku WY, Lee MH, et al. A study on the prevalence and risk factors for neck pain among university academic staff in Hong Kong. J Occup Rehabil. 2002;12(2):77-91. https://doi.org/10.1023/A:1015008513575
  6. Cram J, Kasman G, Holtz J. Introduction of surface electromyography. Gaithersburg, MD: Aspen Publishers; 1998.
  7. Falla D, Farina D. Neural and muscular factors associated with motor impairment in neck pain. Curr Rheumatol Rep. 2007;9(6):497-502. https://doi.org/10.1007/s11926-007-0080-4
  8. Falla D, Farina D, Kanstrup Dahl M, Graven-Nielsen T. Pain-induced changes in cervical muscle activation do not affect muscle fatigability during sustained isometric contraction. J Electromyogr Kinesiol. 2008;18(6):938-46. https://doi.org/10.1016/j.jelekin.2007.05.007
  9. Griegel-Morris P, Laeson K, Mueller-Klaus K, et al. Incidence of common postural abnormalities in the cervical, shoulder and thoracic regions and their association with pain in two age groups of healthy subjects. Phys Ther. 1992;72(6):425-31.
  10. Hansson GA, Nordander C, Asterland P, et al. Sensitivity of trapezius electromyography to differences between work tasks-influence of gap definition and normalisation methods. J Electromyogr Kinesiol. 2000;10(2):103-15. https://doi.org/10.1016/S1050-6411(99)00030-9
  11. Javanshir K, Mohseni-Bandpei MA, Rezasoltani A, et al. Ultrasonography of longus colli muscle: A reliability study on healthy subjects and patients with chronic neck pain. J Bodyw Mov Ther. 2011;15(1):50-6. https://doi.org/10.1016/j.jbmt.2009.07.005
  12. Kang JH, Park RY, Lee SJ, et al. The effect of the forward head posture on postural balance in long time computer based worker. Ann Rehabil Med. 2012;36(1):98-104. https://doi.org/10.5535/arm.2012.36.1.98
  13. Kim MH, Yi CH, Kwon OY et al. Changes in neck muscle electromyography and forward head posture of children when carrying schoolbags. Ergonomics. 2008;51(6):890-901. https://doi.org/10.1080/00140130701852747
  14. Kim MH, Yoo WG. Effects of a visual feedback device for hip adduction on trunk muscles and sitting posture in visual display terminal workers. Asia Pac J Public Health. 2011; 23(3):378-85. https://doi.org/10.1177/1010539511403729
  15. Ministry of employment and labor, Video display terminal (VDT) Guidelines (Notification : 2012-72);2012.
  16. Moffet H, Hagberg M, Hasson-Risberg E, et al. Influence of laptop computer design and working position on physical exposure variables. Clin Biomech (Bristol, Avon). 2002;17(5):368-75. https://doi.org/10.1016/S0021-9290(02)00062-3
  17. Moore MK. Upper crossed syndrome and its relationship to cervicogenic headache. J Manupulative Physiol Ther. 2004;27(8):414-20. https://doi.org/10.1016/j.jmpt.2004.05.007
  18. Park SD, Electromyographic activities of neck and shoulder muscle during the computer typing in forward head posture. Master's thesis. Yonsei university. 2005
  19. Park SY, Yoo WG. Effect of EMG-based feedback on posture correction during computer operation. J Occup Health. 2012;54(4):271-7 https://doi.org/10.1539/joh.12-0052-OA
  20. Psihogios JP, Sommerich CM, Mirka GA, et al. A field evaluation of monitor placement effects in VDT users. Appl Ergon. 2001;32(4):313-25. https://doi.org/10.1016/S0003-6870(01)00014-X
  21. Seghers J, Jochem A, Spaepen A. Posture, muscle activity and muscle fatigue in prolonged VDT work at different screen height settings. Ergonomics. 2003;46(7):714-30. https://doi.org/10.1080/0014013031000090107
  22. Schuldt K, Ekholm J, Harms-Ringdahl K, et al. Effects of changes in sitting work posture on static neck and shoulder muscle activity. Ergonomics. 1986;29(12):1525-37. https://doi.org/10.1080/00140138608967266
  23. Straker L, Pollock C, Burgess-Limerick R, et al. The impact of computer display height and desk design on muscle activity during information technology work by young adults. J Electromyogr Kinesiol. 2008;18(4):606-17. https://doi.org/10.1016/j.jelekin.2006.09.015
  24. Szeto GP, Straker L, O'sullivan PB. A comparison of symptomatic and asymptomatic office workers performing monotonous keyboard work-2: Neck and shoulder kinematics. Man Ther. 2005;10(4):281-91. https://doi.org/10.1016/j.math.2005.01.005
  25. Szeto GP, Straker L, Raine S. A field comparison of neck and shoulder postures in symptomatic and asymptomatic office workers. Appl Ergon. 2002;33(1):75-84. https://doi.org/10.1016/S0003-6870(01)00043-6
  26. Tepper M, Vollenbroek-Hutten MMR, Hermens JH, et al. The effect of an ergonomic computer device n muscle activity of the upper trapezius muscle during typing. Appl Ergon. 2003;34(2):125-30. https://doi.org/10.1016/S0003-6870(02)00145-X
  27. Yi CH, Yoo WG, Kim MH. The effect of forward head posture correctional device during computer work. Phys Ther Kor. 2006;13(1):9-15.
  28. Yoo WG, Kim MH. Effect of different seat support characteristics on the neck and trunk muscles and forward head posture of visual display terminal workers. Work. 2010;36(1):3-8.

Cited by

  1. Research the Effects of Thoracic and Lumbar Support Fixtures on Forward Head Posture during Visual Display Terminal Work vol.11, pp.3, 2013, https://doi.org/10.13066/kspm.2016.11.3.41
  2. 운동 트레이닝과 카이로프랙틱의 복합처치가 전방 머리 자세와 거북목 대상자의 악력과 경추부 근력에 미치는 영향 vol.12, pp.2, 2013, https://doi.org/10.13066/kspm.2017.12.2.121
  3. The Effects of Sitting Posture on Cervical Flexion Angle and Pain during Smart Phone Use in Young Adults vol.24, pp.3, 2017, https://doi.org/10.26862/jkpts.2017.12.24.3.55