The effect of upper extremity support on upper extremity posture and muscle activity during keyboard use

被引:63
作者
Cook, C
Burgess-Limerick, R
Papalia, S
机构
[1] Univ Western Sydney, Sch Exercise & Hlth Sci, Penrith Sth, NSW 1797, Australia
[2] Univ Queensland, Sch Human Movement Studies, Brisbane, Qld 4072, Australia
关键词
computer keyboard; musculoskeletal symptoms; forearm support; wrist rest;
D O I
10.1016/j.apergo.2003.12.005
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Forearm support during keyboard use has been reported to reduce neck and shoulder muscle activity and discomfort. However, the effect of forearm support on wrist posture has not been examined. The aim of this study was to examine the effect of 3 different postures during keyboard use: forearm support, wrist support and "floating". The floating posture (no support) was used as the reference condition. A wrist rest was present in all test conditions. Thirteen participants completed 20 min wordprocessing tasks in each of the test conditions. Electromyography was used to monitor neck, shoulder and forearm muscle activity. Bilateral and overhead video cameras recorded left and right wrist extension, shoulder and elbow flexion and radial and ulnar deviation. The forearm support condition resulted in significantly less ulnar deviation (<p = 0.007), less time spent in extreme ulnar deviation (p = 0.002) and less reports of discomfort than the "floating" condition (p = 0.002). The wrist support but not the forearm support condition resulted in less trapezius and anterior deltoid muscular activity (p < 0.007). These findings indicate that typing with tipper extremity support in conjunction with a wrist rest may be preferable to the "floating" posture implicit in current guidelines. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码:285 / 292
页数:8
相关论文
共 28 条
  • [1] Postural load during VDU work: a comparison between various work postures
    Aaras, A
    Fostervold, KI
    Ro, O
    Thoresen, M
    Larsen, S
    [J]. ERGONOMICS, 1997, 40 (11) : 1255 - 1268
  • [2] Musculoskeletal, visual and psychosocial stress in VDU operators before and after multidisciplinary ergonomic interventions.: A 6 years prospective study -: Part II
    Aarås, A
    Horgen, G
    Bjorset, HH
    Ro, O
    Walsoe, H
    [J]. APPLIED ERGONOMICS, 2001, 32 (06) : 559 - 571
  • [3] Musculoskeletal, visual and psychosocial stress in VDU operators before and after multidisciplinary ergonomic interventions
    Aaras, A
    Horgen, G
    Bjorset, HH
    Ro, O
    Thoresen, M
    [J]. APPLIED ERGONOMICS, 1998, 29 (05) : 335 - 354
  • [4] ALBIN T, 1997, 13 TRIENN C INT ERG
  • [5] Amell TK, 1999, INT J IND ERGONOM, V25, P69
  • [6] Basmajian J. V., 1985, MUSCLES ALIVE THEIR
  • [7] WRIST SUPPORT DURING TYPING - A CONTROLLED, ELECTROMYOGRAPHIC STUDY
    BENDIX, T
    JESSEN, F
    [J]. APPLIED ERGONOMICS, 1986, 17 (03) : 162 - 168
  • [8] MUSCULOSKELETAL DISORDERS AMONG VISUAL-DISPLAY TERMINAL WORKERS - INDIVIDUAL, ERGONOMIC, AND WORK ORGANIZATIONAL-FACTORS
    BERGQVIST, U
    WOLGAST, E
    NILSSON, B
    VOSS, M
    [J]. ERGONOMICS, 1995, 38 (04) : 763 - 776
  • [9] Wrist posture during computer pointing device use
    Burgess-Limerick, R
    Shemmell, J
    Scadden, R
    Plooy, A
    [J]. CLINICAL BIOMECHANICS, 1999, 14 (04) : 280 - 286
  • [10] The prevalence of neck and upper extremity musculoskeletal symptoms in computer mouse users
    Cook, C
    Burgess-Limerick, R
    Chang, SW
    [J]. INTERNATIONAL JOURNAL OF INDUSTRIAL ERGONOMICS, 2000, 26 (03) : 347 - 356