Spinal loading during manual materials handling in a kneeling posture

Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology
Riley E SplittstoesserW S Marras

Abstract

Stooped, restricted, kneeling, and other awkward postures adopted during manual materials handling have frequently been associated with LBP onset. However, lift assessment tools have focused on materials handling performed in an upright, or nearly upright standing posture. Unfortunately, many of the tools designed to analyze standing postures are not easily adapted to jobs requiring restricted postures. Therefore, the objective of this study was to evaluate spinal loading during manual materials handing in kneeling postures and determine if those loads can be predicted using simple regression. An EMG-driven biomechanical model, previously validated for upright lifting, was adapted for use in kneeling tasks. Subjects knelt under a 1.07m ceiling and lifted luggage of six weights (6.8, 10.9, 15.0, 19.1, 23.1 and, 27.2kgf) to one of four destination heights (0, 25.4, 53.3, 78.7cm). Spine loading was significantly affected by both destination height and load weight. Destination height increased compression, AP shear and lateral shear by an average of 14.5, 3.7 and 6.6N respectively per cm height increase. Load weight increased compression, AP shear and lateral shear by an average of 83.8, 27.0 and 13.1N respectively per kgf lifted. ...Continue Reading

References

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Nov 1, 2003·The Spine Journal : Official Journal of the North American Spine Society·Michael J JorgensenThomas R Waters

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Citations

Feb 20, 2008·Experimental Brain Research·Rinaldo André Mezzarane, André Fabio Kohn
Feb 19, 2013·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Jonathan S DufourGregory G Knapik
Jul 16, 2016·The Annals of Occupational Hygiene·Jens WahlströmMikael Forsman
Feb 28, 2019·International Journal of Occupational Safety and Ergonomics : JOSE·Ana ColimAna Cristina Braga
Mar 3, 2020·Work : a Journal of Prevention, Assessment, and Rehabilitation·Kyung-Sun Lee, Jaejin Hwang
Feb 25, 2017·Work : a Journal of Prevention, Assessment, and Rehabilitation·Sıdıka BuldukAlpaslan Güler
Jan 29, 2020·Applied Ergonomics·Eric B WestonWilliam S Marras

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