Evaluation of spinal column exertion and the risk of injury during industrial tasks requiring the lifting of heavy objects: Role of posture Abstract Load lifting has been associated with musculoskeletal disorders of the lower back, but the question of good postures to be adopted is far from resolved. The author proposes a model for analyzing the loads on the spine caused by tasks in a neutral or bent posture, with or without additional weight. Evaluating spinal efforts during handling tasks will determine several essential factors, such as permissible levels and the safest load limit that can be supported by workers, as well as the optimal postures for reducing the risk of injury and back pain. This research helps to evaluate the distribution of loads between passive and active elements as well as in biological tissues. The data thus collected could subsequently allow the evaluation of physical performances, the optimization of rehabilitation exercises as well as therapeutic operations. Produced Under this Project Scientific Reports Evaluation of spinal efforts and the risks of tissue injury during industrial load-hoisting tasks: role of posture Research Report: R-382 Scientific Publications Evaluation of trunk muscle forces and internal loads using Kinematics-based modelingShirazi-Adl A., El-Rich M., Parnianpour M.Source : in Proceedings of the IASTED International Conference in Biomedical Engineering (June 25-27, 2003 : Salzburg, Austria), 2003, p. 114-119On the stability analysis of the human spineEl-Rich M., Shirazi-Adl A.Source : in IMECE03 2003 : ASME International Mechanical Engineering Congress & Exposition (November 16–21, 2003 : Washington, District of Columbia), IMECE2003-43246, p. 1-2Evaluation of trunk muscle forces, internal loads and stability margin in standing posturesEl-Rich M., Shirazi-Adl A.Source : in IXth Annual Canadian Connective Tissue Conference (9th : July 4-6, 2003 : Montréal, Québec), 2003Role of load, posture and coactivity on muscle forces and stability in human spineShirazi-Adl A., El-Rich M., Parnianpour M.Source : in International Society for the Study of the Lumbar Spine (May 13-17, 2003 : Vancouver, Canada), 2003Effect of load magnitude and location on trunk muscle EMG and kinematics in standing posturesShirazi-Adl A., Mitnitski A., Arjmand N., Parnianpour M.Source : in International Society for the Study of the Lumbar Spine (May 13-17, 2003 : Vancouver, Canada), 2003Muscle force evaluation and role of posture in human lumbar spine under compressionShirazi-Adl A., Sadouk S., Parnianpour M., Pop D., El-Rich M.Source : European Spine Journal, vol. 11, 2002, p. 519-526A finite element study on the role of trunk muscles in generating intra-abominal pressureShirazi-Adl A., Arjmand N., Parnianpour M.Source : in ISME 2000 : Proceedings of the 4th International Mechanical Engineering Conference (10th : May 8-10, 2000 : Tehran, Iran), 2002, p. 611-618Computation of trunk muscle forces and internal spinal loads at standing posturesShirazi-Adl A., El-Rich M., Pop D., Parnianpour M.Source : in IMECE2002 : ASME International Mechanical Engineering Congress & Exposition (November 17-22, 2002 : New Orleans, Louisiana), 2002, p. 1-2Determination of spinal muscle forces and internal loads using a novel approachShirazi-Adl A., Pop D., El-Rich M., Parnianpour M.Source : in 29th Annual Meeting of The International Society For The Study of The Lumbar Spine (29th : May 14 - 18, 2002 : Cleveland, Ohio), 2002 A finite element model study on the role of trunk muscles in generating intra-abdominal pressureArjmand N., Shirazi-Adl A., Parnianpour M.Source : Biomedical Engineering, Applications, Basis and Communications, vol. 13, 2001, p. 181-189Evaluation of muscle forces in a synergistic lumbar spine using kinematics-based approach and optimizationShirazi-Adl A., El-Rich M., Pop D., Parnianpour M.Source : Advances in Bioengineering / IMECE2001 ( 2001 : New York, ), 2001Analyse non linéaire par éléments finis du système actif passif de la colonne vertébrale humainePop D. G.Source : Mémoire Maîtrise (M.Sc. A.). Montréal, École Polytechnique, 2001, 112 p.Load-bearing and stress analysis of the human spine under a novel wrapping compression loadingShirazi-Adl A., Parnianpour M.Source : Clinical Biomechanics, vol. 15, 2000, p. 718-725Computational biomechanics of human spine under wrapping compression loadingShirazi-Adl A., Parnianpour M.Source : Mechanics in Biology, vol. 242, 2000, p. 65-76Response of the human spine under follower wrapping compression loadsShirazi-Adl A., Parnianpour M.Source : in ISME 2000 : Proceedings of the 4th International Mechanical Engineering Conference (10th : May 8-10, 2000 : Tehran, Iran), 2002, p. 617-623On passive-active synergy in lumbar spine under axial compressionShirazi-Adl A., Sadouk S., Parnianpour M.Source : in ISME 2000 : Proceedings of the 4th International Mechanical Engineering Conference (10th : May 8-10, 2000 : Tehran, Iran), 2002, p. 611-616On evaluation of muscle forces and spinal passive-active synergy in compressionShirazi-Adl A., Parnianpour M., Sadouk S.Source : in Conference Proceedings of the 24th Annual Meeting of the American Society of Biomechanics (24th : July 19-22, 2000 : Chicago, Illinois), 2000, p. 115-116Trunk biomechanical models based on equilibrium at a single-level violate equilibrium at other levels Arjmand N., Shirazi-Adl A., Parnianpour M.Source : European Spine Journal, vol. 16, no 5, 2007, p. 701-709Wrapping of trunk thoracic extensor muscles influences muscle forces and spinal loads in lifting tasksArjmand N., Shirazi-Adl A.Source : Clinical Biomechanics, vol. 21, no 7, 2006, p. 668-675Analysis of squat and stoop dynamic liftings: muscle forces and internal spinal loadsBazrgari B., Shirazi-Adl A., Arjmand N.Source : European Spine Journal, vol. 16, no 5, 2007, p. 687-699Analysis of large compression loads on lumbar spine in flexion and in torsion using a novel wrapping elementShirazi-Adl A.Source : Journal of Biomechanics, vol. 39, no 2, 2006, p. 267-275Model and in vivo studies on human trunk load partitioning and stability in isometric forward flexionsArjmand N., Shirazi-Adl A.Source : Journal of Biomechanics, vol. 39, no 3, 2006, p. 510-521Role of intra-abdominal pressure in the unloading and stabilization of the human spine during static lifting tasksArjmand N., Shirazi-Adl A.Source : European Spine Journal, vol. 15, no 8, 2006, p. 1265-1275Influence of curved lines of action for trunk extensor muscles on load redistribution and stability of the spine during liftingArjmand N., Shirazi-Adl A., Bazrgari B.Source : Journal of Biomechanics, vol. 39, suppl. 1, 2006, p. S418Load distribution between active-passive systems in squat and stoop dynamic liftsBazrgari B., Shirazi-Adl A., Arjmand N.Source : Journal of Biomechanics, vol. 39, suppl. 1, 2006, p. S101-S102Mathematical and finite element modeling of spine to investigate the effects of intra-abdominal pressure and activation of muscles around abdomin on the spinal stabilityMokhtarzadeh H., Farahmand H., Parnianpour M., Malekipour F., Shirazi-Adl A., Arjmand N.Source : in 8th Biennial ASME Conference on Engineering Systems Design and Analysis, (8th : July 4-7, 2006 : Torino, Italy), 2006Biomechanical analysis of squat and stoop lifts using the Kinematics-driven finite element modelBazrgari B., Shirazi-Adl A., Arjmand N.Source : in ISSLS 2006, Annual Congress of the International Society for the Study of the Lumbar Spine, (June 13-17, 2006 : Bergen, Norway), 2006Role of intra-abdominal pressure in unloading and stabilizing the human spine is task dependentArjmand N., Shirazi-Adl A.Source : in 52th Annual Meeting of Orthopaedic Research Society (52th : March 18-22, 2006 : Chicago, USA), 2006, #1307 Additional Information Type: Project Number: 0098-0090 Status: Completed Year of completion: 2004 Research Field: OSH and Sustainable Prevention Work Environment Team: Aboulfazl Shirazi-Adl (Polytechnique Montréal)Mohamad Parnianpour (OHIO State University)