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An Examination of Shoulder Postures and Moments of Force Among Different Skill Levels in the Wool Harvesting Industry

Treść / Zawartość
Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The wool harvesting industry employs workers of varying skill levels that differ in both quality and number of harvested fleeces. As it was unknown how skill affected parameters such as joint posture and loading, the current study comparatively examined 140 wool harvesting workers representing 4 skill levels during wool harvesting competitions. Three-dimensional upper limb postures and peak and cumulative shoulder moments were calculated for each worker. Results indicated that elite wool harvesters, in general, used different shoulder postures to perform the harvesting tasks and were thus exposed to different shoulder moments as compared to the lower skill levels. It is plausible that these adopted postures allow the higher class workers to perform their job with higher quality and greater speed as compared to the lower ranked workers. Postural-based training may help improve technique in lower ranked workers and enable these workers to achieve higher ranked status.
Słowa kluczowe
Rocznik
Strony
409--418
Opis fizyczny
Bibliogr. 18 poz., rys., tab.
Twórcy
  • Department of Kinesiology, University of Waterloo, Waterloo, ON, Canada
autor
  • Centre for Physiotherapy Research, University of Otago, Dunedin, New Zealand
autor
  • Centre for Physiotherapy Research, University of Otago, Dunedin, New Zealand
  • Centre for Physiotherapy Research, University of Otago, Dunedin, New Zealand
  • Department of Kinesiology, University of Waterloo, Waterloo, ON, Canada
Bibliografia
  • 1.Marshall RN, Burnett AF. A kinematic, kinetic and electromyographic comparison of stooped sheep shearing techniques and shearing with a sheep manipulator. Appl Ergon. 2004;35:137–45.
  • 2.Milosavljevic S, Carman AB, Milburn PD, Wilson BD, Davidson PL. The influence of a back support harness on spinal forces during sheep shearing. Ergonomics. 2004;47:1208–25.
  • 3.Milosavljevic S, Carman AB, Schneiders AG, Milburn PD, Wilson BD. Threedimensional spinal motion and risk of low back injury during sheep shearing. Appl Ergon. 2007;38:299–306.
  • 4.Gregory DE, Milosavljevic S, Callaghan JP. Quantifying low back peak and cumulative loads in open and senior sheep shearers in New Zealand: examining the effects of a trunk harness. Ergonomics. 2006;49:968–81.
  • 5.Gregory DE, Milosavljevic S, Pal P, Callaghan JP. An examinations of shoulder kinematics and kinetics when using a commercial trunk harness while sheep shearing. Appl Ergon. 2008;39:29–35.
  • 6.Chany AM, Parakkat J, Yang G, Burr DL, Marras WS. Changes in spine loading patterns throughout the workday as a function of experience, lift frequency, and personality. Spine J. 2006;6:296–305.
  • 7.Daynard D, Yassi A, Cooper JE, Tate R, Norman R, Wells R. Biomechanical analysis of peak and cumulative spinal loads during simulated patient handling activities: a substudy of a randomized controlled trial to prevent lift and transfer injury of health care workers. Appl Ergon. 2001;32:199–214.
  • 8.Videman T, Nurminen T, Tola S, Kuorinka I, Vanharanta H, Troup JD. Low-back pain in nurses and some loading factors of work. Spine. 1984;9:400–4.
  • 9.Keir PJ, MacDonell CW. Muscle activity during patient transfers: a preliminary study on the influence of lift assists and experience. Ergonomics. 2004;47:296–306.
  • 10.Andrews DM, Callaghan JP. Determining the minimum sampling rate needed to accurately quantify cumulative spine loading from digitized video. Appl Ergon. 2003;34:589–95.
  • 11.Harvey JT, Culvenor J, Payne W, Cowley S, Lawrance M, Stuart D, et al. An analysis of the forces required to drag sheep over various surfaces. Appl Ergon. 2002;33:523–31.
  • 12.Johnstone J. Clutha District sheep and beef farm statistics 2006. Balclutha, New Zealand: Shand Thomson; 2007.
  • 13.Gmeinder GE. Back complaints among shearers in Western Australia: a pilot study. Australian J Physiother. 1986;32:139–44.
  • 14.McAtamney L, Corlett EN. Ergonomic workplace assessment in a health care context. Ergonomics. 1992;35:965–78.
  • 15.Jackson J, Reed B, Andrews DM, Albert WJ, Callaghan JP. Usability of 3DMatch—an evaluation of the interand intra-observer reliability of posture matching to calculate cumulative low back loading [unpublished presentation]. 34th Annual Conference of the Association of Canadian Ergonomists; London, ON, Canada; 2003.
  • 16.Tectra wool handling handbook. Christchurch, New Zealand: Tectra; 2006.
  • 17.Australian Wool Innovation. Wool Harvesting OH&S Injury and Cost Evaluation Review 2005-06 Analysis & Update of 5 Year Analysis (Project WP197); 2007. Retrieved October 15, 2009, from: http://images.wool.com/pub/ingOHSInjuryandCost.pdf.
  • 18.Sutherland CA, Albert WJ, Wrigley AT, Callaghan JP. The effect of camera viewing angle on posture assessment repeatability and cumulative spinal loading. Ergonomics. 2007;50:877–89.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-5f587556-1f80-4858-9a27-9c0812ba94df
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