Browse > Article
http://dx.doi.org/10.13066/kspm.2013.8.4.601

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

Lee, Won-Hwee (Department of Physical Therapy, Vision University, College of Jeonju)
Publication Information
Journal of the Korean Society of Physical Medicine / v.8, no.4, 2013 , pp. 601-608 More about this Journal
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
Computer work; Electromyography; Forward head posture; Motion analysis;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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.   DOI   ScienceOn
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.   DOI   ScienceOn
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.   DOI   ScienceOn
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.   DOI   ScienceOn
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.   DOI   ScienceOn
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.   DOI   ScienceOn
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.   DOI   ScienceOn
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.   DOI   ScienceOn
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.   DOI   ScienceOn
13 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.   DOI   ScienceOn
14 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.   DOI   ScienceOn
15 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.   DOI
16 Ministry of employment and labor, Video display terminal (VDT) Guidelines (Notification : 2012-72);2012.
17 Moore MK. Upper crossed syndrome and its relationship to cervicogenic headache. J Manupulative Physiol Ther. 2004;27(8):414-20.   DOI   ScienceOn
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   DOI
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.   DOI   ScienceOn
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.   DOI   ScienceOn
22 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.   DOI   ScienceOn
23 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.   DOI   ScienceOn
24 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.   DOI   ScienceOn
25 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.   DOI   ScienceOn
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.   DOI   ScienceOn
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.   과학기술학회마을
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.