Does the asymmetry multiplier in the 1991 NIOSH lifting equation adequately control the biomechanical loading of the spine?
The aim of this research was to evaluate whether the asymmetry multiplier incorporated in the 1991 National Institute for Occupational Safety and Health lifting equation adequately controls the biomechanical spine loads during asymmetric lifting. Sixteen male subjects lifted a box from four initial...
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| Veröffentlicht in: | Ergonomics 2009-01, Vol.52 (1), p.71-79 |
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| creator | Lavender, S. A. Li, Y. C. Natarajan, R. N. Andersson, G. B.J. |
| description | The aim of this research was to evaluate whether the asymmetry multiplier incorporated in the 1991 National Institute for Occupational Safety and Health lifting equation adequately controls the biomechanical spine loads during asymmetric lifting. Sixteen male subjects lifted a box from four initial locations varying in terms of the angular deviation from the mid-sagittal plane (0, 30, 60 and 90°). From each location, boxes that weighed the recommended weight limit (RWL) and three times the RWL were lifted at two qualitatively defined lifting speeds. Ground reaction forces were combined with kinematic data in a linked-segment model to quantify the 3-D moments at the base of the spine (L5/S1) and the spine compression forces. The results show that the twisting and lateral bending moments increased with task asymmetry despite the lessening of the RWL (p |
| doi_str_mv | 10.1080/00140130802480802 |
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A. ; Li, Y. C. ; Natarajan, R. N. ; Andersson, G. B.J.</creator><creatorcontrib>Lavender, S. A. ; Li, Y. C. ; Natarajan, R. N. ; Andersson, G. B.J.</creatorcontrib><description>The aim of this research was to evaluate whether the asymmetry multiplier incorporated in the 1991 National Institute for Occupational Safety and Health lifting equation adequately controls the biomechanical spine loads during asymmetric lifting. Sixteen male subjects lifted a box from four initial locations varying in terms of the angular deviation from the mid-sagittal plane (0, 30, 60 and 90°). From each location, boxes that weighed the recommended weight limit (RWL) and three times the RWL were lifted at two qualitatively defined lifting speeds. Ground reaction forces were combined with kinematic data in a linked-segment model to quantify the 3-D moments at the base of the spine (L5/S1) and the spine compression forces. The results show that the twisting and lateral bending moments increased with task asymmetry despite the lessening of the RWL (p < 0.01). The flexion moment and the spine compression decreased with asymmetry, although at a slower rate than the RWL. When the dynamics were removed from the linked segment spine model to approximate the assumption of slow and smooth lifting, the estimated compression remained approximately 3400 N across all asymmetry conditions. Thus, the reduction in the RWL due to asymmetry multiplier appears appropriate and should not be changed, as been suggested by recent psychophysical studies.</description><identifier>ISSN: 0014-0139</identifier><identifier>EISSN: 1366-5847</identifier><identifier>DOI: 10.1080/00140130802480802</identifier><identifier>PMID: 19308820</identifier><identifier>CODEN: ERGOAX</identifier><language>eng</language><publisher>London: Taylor & Francis</publisher><subject>Adult ; Applied physiology ; Biological and medical sciences ; Biomechanical Phenomena ; Biomechanics ; Ergonomics ; Ergonomics. Work place. Occupational physiology ; Human performance ; Human physiology applied to population studies and life conditions. Human ecophysiology ; Humans ; Lifting ; Lumbar Vertebrae - physiology ; Male ; manual materials handling ; Medical sciences ; Models, Biological ; National Institute for Occupational Safety and Health (U.S.) ; NIOSH lifting equation ; Occupational safety ; Pelvis - physiology ; Sacrum - physiology ; Shear loading ; Space life sciences ; Spine ; spine biomechanics ; Studies ; Thorax - physiology ; United States ; Young Adult</subject><ispartof>Ergonomics, 2009-01, Vol.52 (1), p.71-79</ispartof><rights>Copyright Taylor & Francis Group, LLC 2009</rights><rights>2009 INIST-CNRS</rights><rights>Copyright Taylor & Francis Group Jan 2009</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c585t-8fd730fa03fc02927434e935f9097e018b4a6b2fa598d39a98db9a5093b1bc243</citedby><cites>FETCH-LOGICAL-c585t-8fd730fa03fc02927434e935f9097e018b4a6b2fa598d39a98db9a5093b1bc243</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.tandfonline.com/doi/pdf/10.1080/00140130802480802$$EPDF$$P50$$Ginformaworld$$H</linktopdf><linktohtml>$$Uhttps://www.tandfonline.com/doi/full/10.1080/00140130802480802$$EHTML$$P50$$Ginformaworld$$H</linktohtml><link.rule.ids>315,782,786,4026,27930,27931,27932,59654,60443</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=21345561$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/19308820$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Lavender, S. A.</creatorcontrib><creatorcontrib>Li, Y. C.</creatorcontrib><creatorcontrib>Natarajan, R. N.</creatorcontrib><creatorcontrib>Andersson, G. B.J.</creatorcontrib><title>Does the asymmetry multiplier in the 1991 NIOSH lifting equation adequately control the biomechanical loading of the spine?</title><title>Ergonomics</title><addtitle>Ergonomics</addtitle><description>The aim of this research was to evaluate whether the asymmetry multiplier incorporated in the 1991 National Institute for Occupational Safety and Health lifting equation adequately controls the biomechanical spine loads during asymmetric lifting. Sixteen male subjects lifted a box from four initial locations varying in terms of the angular deviation from the mid-sagittal plane (0, 30, 60 and 90°). From each location, boxes that weighed the recommended weight limit (RWL) and three times the RWL were lifted at two qualitatively defined lifting speeds. Ground reaction forces were combined with kinematic data in a linked-segment model to quantify the 3-D moments at the base of the spine (L5/S1) and the spine compression forces. The results show that the twisting and lateral bending moments increased with task asymmetry despite the lessening of the RWL (p < 0.01). The flexion moment and the spine compression decreased with asymmetry, although at a slower rate than the RWL. When the dynamics were removed from the linked segment spine model to approximate the assumption of slow and smooth lifting, the estimated compression remained approximately 3400 N across all asymmetry conditions. Thus, the reduction in the RWL due to asymmetry multiplier appears appropriate and should not be changed, as been suggested by recent psychophysical studies.</description><subject>Adult</subject><subject>Applied physiology</subject><subject>Biological and medical sciences</subject><subject>Biomechanical Phenomena</subject><subject>Biomechanics</subject><subject>Ergonomics</subject><subject>Ergonomics. Work place. Occupational physiology</subject><subject>Human performance</subject><subject>Human physiology applied to population studies and life conditions. Human ecophysiology</subject><subject>Humans</subject><subject>Lifting</subject><subject>Lumbar Vertebrae - physiology</subject><subject>Male</subject><subject>manual materials handling</subject><subject>Medical sciences</subject><subject>Models, Biological</subject><subject>National Institute for Occupational Safety and Health (U.S.)</subject><subject>NIOSH lifting equation</subject><subject>Occupational safety</subject><subject>Pelvis - physiology</subject><subject>Sacrum - physiology</subject><subject>Shear loading</subject><subject>Space life sciences</subject><subject>Spine</subject><subject>spine biomechanics</subject><subject>Studies</subject><subject>Thorax - physiology</subject><subject>United States</subject><subject>Young Adult</subject><issn>0014-0139</issn><issn>1366-5847</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkV1rFDEUQIModm39Ab5IEPRtNF-TSUAo0qotFPtQfR4yM4lNySTbJIMO_fNmdleFlrIvyQ33nJvcXABeYfQeI4E-IIQZwrSEhIllfQJWmHJe1YI1T8FqyVcFkAfgRUo35UixJM_BAZZFEgStwN1p0Anmaw1VmsdR5zjDcXLZrp3VEVq_yWEpMfx2fnl1Bp012fqfUN9OKtvgoRo2oXYz7IPPMbiN0tkw6v5aedsrB11Qw2IFs0mmtfX6-Ag8M8ol_XK3H4IfXz5_PzmrLi6_np98uqj6WtS5EmZoKDIKUdMjIknDKNOS1kYi2WiERccU74hRtRQDlaqsnVQ1krTDXU8YPQTvtnXXMdxOOuV2tKnXzimvw5Ra3qCaI0r2gpRyiSXme0FSPl5yhgr45h54E6boS7eFEZISQZf34S3Ux5BS1KZdRzuqOLcYtcug2weDLs7rXeGpG_Xw39hNtgBvd4BKZQImKt_b9I8jmLK65rhwzZaz3oQ4ql8huqHNanYh_pUeXN_m37mYH_ea9PEO_gBEVtOG</recordid><startdate>20090101</startdate><enddate>20090101</enddate><creator>Lavender, S. 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N. ; Andersson, G. B.J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c585t-8fd730fa03fc02927434e935f9097e018b4a6b2fa598d39a98db9a5093b1bc243</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Adult</topic><topic>Applied physiology</topic><topic>Biological and medical sciences</topic><topic>Biomechanical Phenomena</topic><topic>Biomechanics</topic><topic>Ergonomics</topic><topic>Ergonomics. Work place. Occupational physiology</topic><topic>Human performance</topic><topic>Human physiology applied to population studies and life conditions. Human ecophysiology</topic><topic>Humans</topic><topic>Lifting</topic><topic>Lumbar Vertebrae - physiology</topic><topic>Male</topic><topic>manual materials handling</topic><topic>Medical sciences</topic><topic>Models, Biological</topic><topic>National Institute for Occupational Safety and Health (U.S.)</topic><topic>NIOSH lifting equation</topic><topic>Occupational safety</topic><topic>Pelvis - physiology</topic><topic>Sacrum - physiology</topic><topic>Shear loading</topic><topic>Space life sciences</topic><topic>Spine</topic><topic>spine biomechanics</topic><topic>Studies</topic><topic>Thorax - physiology</topic><topic>United States</topic><topic>Young Adult</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lavender, S. A.</creatorcontrib><creatorcontrib>Li, Y. C.</creatorcontrib><creatorcontrib>Natarajan, R. N.</creatorcontrib><creatorcontrib>Andersson, G. 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A.</au><au>Li, Y. C.</au><au>Natarajan, R. N.</au><au>Andersson, G. B.J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Does the asymmetry multiplier in the 1991 NIOSH lifting equation adequately control the biomechanical loading of the spine?</atitle><jtitle>Ergonomics</jtitle><addtitle>Ergonomics</addtitle><date>2009-01-01</date><risdate>2009</risdate><volume>52</volume><issue>1</issue><spage>71</spage><epage>79</epage><pages>71-79</pages><issn>0014-0139</issn><eissn>1366-5847</eissn><coden>ERGOAX</coden><abstract>The aim of this research was to evaluate whether the asymmetry multiplier incorporated in the 1991 National Institute for Occupational Safety and Health lifting equation adequately controls the biomechanical spine loads during asymmetric lifting. Sixteen male subjects lifted a box from four initial locations varying in terms of the angular deviation from the mid-sagittal plane (0, 30, 60 and 90°). From each location, boxes that weighed the recommended weight limit (RWL) and three times the RWL were lifted at two qualitatively defined lifting speeds. Ground reaction forces were combined with kinematic data in a linked-segment model to quantify the 3-D moments at the base of the spine (L5/S1) and the spine compression forces. The results show that the twisting and lateral bending moments increased with task asymmetry despite the lessening of the RWL (p < 0.01). The flexion moment and the spine compression decreased with asymmetry, although at a slower rate than the RWL. When the dynamics were removed from the linked segment spine model to approximate the assumption of slow and smooth lifting, the estimated compression remained approximately 3400 N across all asymmetry conditions. Thus, the reduction in the RWL due to asymmetry multiplier appears appropriate and should not be changed, as been suggested by recent psychophysical studies.</abstract><cop>London</cop><cop>Washington, DC</cop><pub>Taylor & Francis</pub><pmid>19308820</pmid><doi>10.1080/00140130802480802</doi><tpages>9</tpages></addata></record> |
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| subjects | Adult Applied physiology Biological and medical sciences Biomechanical Phenomena Biomechanics Ergonomics Ergonomics. Work place. Occupational physiology Human performance Human physiology applied to population studies and life conditions. Human ecophysiology Humans Lifting Lumbar Vertebrae - physiology Male manual materials handling Medical sciences Models, Biological National Institute for Occupational Safety and Health (U.S.) NIOSH lifting equation Occupational safety Pelvis - physiology Sacrum - physiology Shear loading Space life sciences Spine spine biomechanics Studies Thorax - physiology United States Young Adult |
| title | Does the asymmetry multiplier in the 1991 NIOSH lifting equation adequately control the biomechanical loading of the spine? |
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