The influence of load knowledge on lifting technique
The purpose of this study was to analyse the influence of load knowledge on lifting technique. Ten men lifted a box containing either no weight or weights of 150, 250 or 300 N with and without knowledge of what was inside the box. The kinetics and kinematics of the HA were analysed using a force pla...
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| Veröffentlicht in: | Ergonomics 1993-12, Vol.36 (12), p.1489-1493 |
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| creator | BUTLER, D. ANDERSSON, G. B. J. TRAFIMOW, J. SCHIPPLEIN, O. D. ANDRIACCHI, T. P. |
| description | The purpose of this study was to analyse the influence of load knowledge on lifting technique. Ten men lifted a box containing either no weight or weights of 150, 250 or 300 N with and without knowledge of what was inside the box. The kinetics and kinematics of the HA were analysed using a force plate, an optoelectronic motion analysis system, and a rigid body link model. At ON lifting, the unknown load resulted in a jerk-like motion and a significantly increased peak L5-S1 flexion-extension moment. At 150N there was also a significant increase in the speed of trunk extension with unknown weights, but the L5-S1 moment remained unchanged. At higher load levels there were only minor differences between lifting techniques when knowing and not knowing the load. We conclude that lifts are approached assuming a certain weight, and that when the assumption is wrong and the load lighter than anticipated lifting is performed with a 'jerking' motion, creating unnecessary loads on the lower back. |
| doi_str_mv | 10.1080/00140139308968016 |
| format | Article |
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B. J. ; TRAFIMOW, J. ; SCHIPPLEIN, O. D. ; ANDRIACCHI, T. P.</creator><creatorcontrib>BUTLER, D. ; ANDERSSON, G. B. J. ; TRAFIMOW, J. ; SCHIPPLEIN, O. D. ; ANDRIACCHI, T. P.</creatorcontrib><description>The purpose of this study was to analyse the influence of load knowledge on lifting technique. Ten men lifted a box containing either no weight or weights of 150, 250 or 300 N with and without knowledge of what was inside the box. The kinetics and kinematics of the HA were analysed using a force plate, an optoelectronic motion analysis system, and a rigid body link model. At ON lifting, the unknown load resulted in a jerk-like motion and a significantly increased peak L5-S1 flexion-extension moment. At 150N there was also a significant increase in the speed of trunk extension with unknown weights, but the L5-S1 moment remained unchanged. At higher load levels there were only minor differences between lifting techniques when knowing and not knowing the load. We conclude that lifts are approached assuming a certain weight, and that when the assumption is wrong and the load lighter than anticipated lifting is performed with a 'jerking' motion, creating unnecessary loads on the lower back.</description><identifier>ISSN: 0014-0139</identifier><identifier>EISSN: 1366-5847</identifier><identifier>DOI: 10.1080/00140139308968016</identifier><identifier>PMID: 8287855</identifier><identifier>CODEN: ERGOAX</identifier><language>eng</language><publisher>London: Taylor & Francis Group</publisher><subject>Adult ; Applied physiology ; Attitude ; Biological and medical sciences ; Dynamic spine model ; Ergonomics ; Ergonomics. Work place. Occupational physiology ; Hip Joint - physiology ; Human physiology applied to population studies and life conditions. 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B. J.</creatorcontrib><creatorcontrib>TRAFIMOW, J.</creatorcontrib><creatorcontrib>SCHIPPLEIN, O. D.</creatorcontrib><creatorcontrib>ANDRIACCHI, T. P.</creatorcontrib><title>The influence of load knowledge on lifting technique</title><title>Ergonomics</title><addtitle>Ergonomics</addtitle><description>The purpose of this study was to analyse the influence of load knowledge on lifting technique. Ten men lifted a box containing either no weight or weights of 150, 250 or 300 N with and without knowledge of what was inside the box. The kinetics and kinematics of the HA were analysed using a force plate, an optoelectronic motion analysis system, and a rigid body link model. At ON lifting, the unknown load resulted in a jerk-like motion and a significantly increased peak L5-S1 flexion-extension moment. At 150N there was also a significant increase in the speed of trunk extension with unknown weights, but the L5-S1 moment remained unchanged. At higher load levels there were only minor differences between lifting techniques when knowing and not knowing the load. We conclude that lifts are approached assuming a certain weight, and that when the assumption is wrong and the load lighter than anticipated lifting is performed with a 'jerking' motion, creating unnecessary loads on the lower back.</description><subject>Adult</subject><subject>Applied physiology</subject><subject>Attitude</subject><subject>Biological and medical sciences</subject><subject>Dynamic spine model</subject><subject>Ergonomics</subject><subject>Ergonomics. Work place. Occupational physiology</subject><subject>Hip Joint - physiology</subject><subject>Human physiology applied to population studies and life conditions. Human ecophysiology</subject><subject>Humans</subject><subject>Knee Joint - physiology</subject><subject>Lifting technique</subject><subject>Lower back pain</subject><subject>Male</subject><subject>Medical sciences</subject><subject>Movement - physiology</subject><subject>Space life sciences</subject><subject>Spinal loading</subject><subject>Spine</subject><subject>Stress</subject><subject>Unknown load</subject><subject>Weight-Bearing - physiology</subject><issn>0014-0139</issn><issn>1366-5847</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1993</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>K30</sourceid><recordid>eNqNkk1PFTEUhhujwSvwA1yYTNToaqSnnX4lbgxRICFxA-tJpx8w2NtiOxPCv6eTe2GBAVk17XnOez7eIvQe8DfAEh9gDB0GqiiWiksM_BVaAeW8ZbITr9FqibcL8Ba9K-WqXikosoN2JJFCMrZC3dmla8bow-yicU3yTUjaNn9iugnOXtSX2ITRT2O8aCZnLuP4d3Z76I3Xobj97bmLzn_9PDs8bk9_H50c_jhtDSNiag0YjJmhflBOcQZKMOm09Y4YQi1xFhvjnRgEUx4I0x5rwYdBKOsHZ31Hd9GXje51TrVsmfr1WIwLQUeX5tILDpzX6Sv49XmwY7V-J9R_JQknkkugLwABAxNLkx8fgVdpzrHupSfVFgK8W8p-egoCioFQuhkDNpTJqZTsfH-dx7XOtz3gfjG8_8fwmvNhqzwPa2cfMrYO1_jnbVwXo4PPOpqxPGBVimG1yHzfYPUvpLzWNykH20_6NqR8n0Of7uIOW3HCQw</recordid><startdate>19931201</startdate><enddate>19931201</enddate><creator>BUTLER, D.</creator><creator>ANDERSSON, G. 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B. J.</au><au>TRAFIMOW, J.</au><au>SCHIPPLEIN, O. D.</au><au>ANDRIACCHI, T. P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The influence of load knowledge on lifting technique</atitle><jtitle>Ergonomics</jtitle><addtitle>Ergonomics</addtitle><date>1993-12-01</date><risdate>1993</risdate><volume>36</volume><issue>12</issue><spage>1489</spage><epage>1493</epage><pages>1489-1493</pages><issn>0014-0139</issn><eissn>1366-5847</eissn><coden>ERGOAX</coden><abstract>The purpose of this study was to analyse the influence of load knowledge on lifting technique. Ten men lifted a box containing either no weight or weights of 150, 250 or 300 N with and without knowledge of what was inside the box. The kinetics and kinematics of the HA were analysed using a force plate, an optoelectronic motion analysis system, and a rigid body link model. At ON lifting, the unknown load resulted in a jerk-like motion and a significantly increased peak L5-S1 flexion-extension moment. At 150N there was also a significant increase in the speed of trunk extension with unknown weights, but the L5-S1 moment remained unchanged. At higher load levels there were only minor differences between lifting techniques when knowing and not knowing the load. We conclude that lifts are approached assuming a certain weight, and that when the assumption is wrong and the load lighter than anticipated lifting is performed with a 'jerking' motion, creating unnecessary loads on the lower back.</abstract><cop>London</cop><cop>Washington, DC</cop><pub>Taylor & Francis Group</pub><pmid>8287855</pmid><doi>10.1080/00140139308968016</doi><tpages>5</tpages></addata></record> |
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| ispartof | Ergonomics, 1993-12, Vol.36 (12), p.1489-1493 |
| issn | 0014-0139 1366-5847 |
| language | eng |
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| source | MEDLINE; Periodicals Index Online; Taylor & Francis:Master (3349 titles) |
| subjects | Adult Applied physiology Attitude Biological and medical sciences Dynamic spine model Ergonomics Ergonomics. Work place. Occupational physiology Hip Joint - physiology Human physiology applied to population studies and life conditions. Human ecophysiology Humans Knee Joint - physiology Lifting technique Lower back pain Male Medical sciences Movement - physiology Space life sciences Spinal loading Spine Stress Unknown load Weight-Bearing - physiology |
| title | The influence of load knowledge on lifting technique |
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