The effect of camera viewing angle on posture assessment repeatability and cumulative spinal loading.
Video-based task analysis in the workplace is often limited by equipment location and production line arrangement, therefore making it difficult to capture the motion in a single plane. The purpose of this study was to investigate the effects of camera placement on an observer's ability to accuratel...
| Publicado en: | Ergonomics Vol. 50; no. 6; pp. 877 - 890 |
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| Autores principales: | , , , |
| Formato: | equations & formulas pictorial research tables/charts Journal Article |
| Publicado: |
Taylor & Francis Ltd
Jun2007
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=106140244&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 106140244 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00140139 ERO jtl: Ergonomics issn: 00140139 maglogo: Y pubinfo: dt: Jun2007 vid: 50 iid: 6 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 106140244 106140244 2009578854 10.1080/00140130701237675 NLM17457747 106140244 ppf: 877 ppct: 13 formats: tig: atl: The effect of camera viewing angle on posture assessment repeatability and cumulative spinal loading. aug: au: Sutherland CA Albert WJ Wrigley AT Callaghan JP affil: Faculty of Kinesiology, University of New Brunswick. P.O. Box 4400, Fredericton, New Brunswick, E3B 5A3. Canada. sug: subj: Back Cumulative Trauma Disorders Complications Joints Physiology Occupational Diseases Complications Posture Physiology Spinal Injuries Etiology Videorecording Weight-Bearing Adult Applied Kinesiology Body Weights and Measures Descriptive Statistics Female Funding Source Interrater Reliability Intraclass Correlation Coefficient Male Multiple Linear Regression One-Way Analysis of Variance Reproducibility of Results Human Adult: 19-44 years Female Male ab: Video-based task analysis in the workplace is often limited by equipment location and production line arrangement, therefore making it difficult to capture the motion in a single plane. The purpose of this study was to investigate the effects of camera placement on an observer's ability to accurately assess working postures in three dimensions and the resultant influence on the reliability and repeatability of calculated cumulative loading variables. Four video cameras were placed at viewing angles of 0 degrees , 45 degrees , 60 degrees and 90 degrees to the frontal plane, enabling the simultaneous collection of views of four lifting tasks (two symmetric and two asymmetric). A total of 11 participants were trained in the use of the 3DMatch 3-D posture matching software package (developed at the University of Waterloo) and were required to analyse 16 lifting trials. Four of the participants were randomly selected to return within 72 h and repeat the analysis protocol to test intra-observer repeatability. Posture matching agreement between camera views was higher when the body segments had a minimal range of motion during the task. There was no significant participant main effect; however, there was a significant (p < 0.05) task main effect. Intraclass correlation coefficients (ICC) were calculated to assess the between day reliability. Compression, reaction anterior shear and extension moment were all found to have excellent reliability (ICC > 0.75). Joint anterior shear and joint posterior shear both provided fair to good reliability (0.4 > ICC < 0.75). Overall, the impact of the camera viewing angle on an observer's ability to match working postural exposure was found to be small. pubtype: Academic Journal doctype: equations & formulas pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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