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 (이원휘)

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

Journal of the Korean Society of Physical Medicine
Abbr : J Korean Soc Phys Med
2013, 8(4), pp.601-608
Publisher : The Korean Society of Physical Medicine
Research Area : Medicine and Pharmacy > Physical Therapy > Other physical therapy

Lee Won hwee ¹

¹전주비전대학교

Candidate

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

Citation status

* References for papers published after 2023 are currently being built.

[journal] Babski-Reeves K / 2005 / Assessment of video display workstation set up on risk factors associated with the development of low back and neck discomfort / Int J Ind Ergon 35 : 593~604

[journal] Burgess-Limerick R / 1998 / The effect of imposed and self-selected computer monitor height on posture and gaze angle / Clin Biomech 13(8) : 584~592

[journal] Caneiro JP / 2010 / The influence of different sitting postures on head/neck posture and muscle activity / Man Ther 15(1) : 54~60

[journal] Chiou WK / 2012 / Notebook computer use with different monitor tilt angle: effects on posture, muscle activity and discomfort of neck pain users / Work 41(Suppl) : 2591~2595

[journal] Chiu TT / 2002 / A study on the prevalence and risk factors for neck pain among university academic staff in Hong Kong / J Occup Rehabil 12(2) : 77~91

[book] Cram J / 1998 / Introduction of surface electromyography / Aspen Publishers

[journal] Falla D / 2007 / Neural and muscular factors associated with motor impairment in neck pain / Curr Rheumatol Rep 9(6) : 497~502

[journal] Falla D / 2008 / Pain-induced changes in cervical muscle activation do not affect muscle fatigability during sustained isometric contraction / J Electromyogr Kinesiol 18(6) : 938~946

[journal] Griegel-Morris P / 1992 / 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 72(6) : 425~431

[journal] Hansson GA / 2000 / Sensitivity of trapezius electromyography to differences between work tasks-influence of gap definition and normalisation methods / J Electromyogr Kinesiol 10(2) : 103~115

[journal] Javanshir K / 2011 / Ultrasonography of longus colli muscle: A reliability study on healthy subjects and patients with chronic neck pain / J Bodyw Mov Ther 15(1) : 50~56

[journal] Jung-Ho Kang / 2012 / The Effect of The Forward Head Posture on Postural Balance in Long Time Computer Based Worker / Annals of Rehabilitation Medicine / 대한재활의학회 36(1) : 98~104

[journal] Kim MH / 2008 / Changes in neck muscle electromyography and forward head posture of children when carrying schoolbags / Ergonomics 51(6) : 890~901

[journal] Kim MH / 2011 / 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 23(3) : 378~385

[other] Ministry of employment and labor / 2012 / Video display terminal (VDT) Guidelines (Notification : 2012-72)

[journal] Moffet H / 2002 / Influence of laptop computer design and working position on physical exposure variables / Clin Biomech(Bristol, Avon) 17(5) : 368~375

[journal] Moore MK / 2004 / Upper crossed syndrome and its relationship to cervicogenic headache / J Manupulative Physiol Ther 27(8) : 414~420

[thesis] Park SD / 2005 / Electromyographic activities of neck and shoulder muscle during the computer typing in forward head posture / 석사 / Yonsei university

[journal] Park SY / 2012 / Effect of EMG-based feedback on posture correction during computer operation / J Occup Health 54(4) : 271~277

[journal] Psihogios JP / 2001 / A field evaluation of monitor placement effects in VDT users / Appl Ergon 32(4) : 313~325

[journal] Seghers J / 2003 / Posture, muscle activity and muscle fatigue in prolonged VDT work at different screen height settings / Ergonomics 46(7) : 714~730

[journal] Schuldt K / 1986 / Effects of changes in sitting work posture on static neck and shoulder muscle activity / Ergonomics 29(12) : 1525~1537

[journal] Straker L / 2008 / The impact of computer display height and desk design on muscle activity during information technology work by young adults / J Electromyogr Kinesiol 18(4) : 606~617

[journal] Szeto GP / 2005 / A comparison of symptomatic and asymptomatic office workers performing monotonous keyboard work-2 : Neck and shoulder kinematics / Man Ther 10(4) : 281~291

[journal] Szeto GP / 2002 / A field comparison of neck and shoulder postures in symptomatic and asymptomatic office workers / Appl Ergon 33(1) : 75~84

[journal] Tepper M / 2003 / The effect of an ergonomic computer device n muscle activity of the upper trapezius muscle during typing / Appl Ergon 34(2) : 125~130

[journal] 이충휘 / 2006 / The Effect of Forward Head Posture Correctional DeviceDuring Computer Work / 한국전문물리치료학회지 / 한국전문물리치료학회 13(1) : 9~15

[journal] Yoo WG / 2010 / Effect of different seat support characteristics on the neck and trunk muscles and forward head posture of visual display terminal workers / Work 36(1) : 3~8

KJCKorea
Journal Central

Journal of the Korean Society of Physical Medicine 2023 KCI Impact Factor : 0.45