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Biomechanical Evaluation—Criteria of Overload

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The Dortmund Lumbar Load Atlas

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Abstract

For assessing the lumbar load resulting from manual materials handling, various biomechanical overload criteria with regard to moments of force as well as compressive and shear forces on lumbar elements such as vertebrae or intervertebral discs are explained. For short-term exposures, such as single handling operations, the overload criteria are based on expert estimates or are derived from mechanical strength tests on autopsy material due to the destructive nature of direct quantification. On the basis of cumulative lumbar load quantifications for the entire working life in combination with the occurrence of diseases, criteria for lumbar load-bearing capacity for long-term physical exposures were derived. Innovative, biomechanically justified daily exposure limits provide sufficient protection against the development of degenerative diseases of the lower back.

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Notes

  1. 1.

    At this point, I would like to express my very special thanks to the colleagues of the EPILIFT study (U. Bolm-Audorff, D. Ditchen, R. Ellegast, G. Elsner, O. Geiß, J. Grifka, J. Haerting, F. Hofmann, O. Linhardt, K. Lukaszewski, A. Luttmann, M. Michaelis, M. Nübling, G. Petereit-Haack, B. Schumann, J. Voß, A. Seidler)—and in particular to the study chair (U.B.-A.)—, without whose intensive commitment the manifold results could not have been compiled.

  2. 2.

    At this point, I would like to express my very special thanks to the colleagues of the EPILIFT2 study (A. Seidler, A. Bergmann, U. Bolm-Audorff, D. Ditchen, R. Ellegast, U. Euler, J. Haerting, E. Haufe, S. Jähnichen, C. Jordan, N. Kersten, O. Kuss, N. Lundershausen, A. Luttmann, P. Morfeld, G. Petereit-Haack, K. Schäfer, J. Voß)—and in particular to the study chair (A.S.)—, without whose intensive commitment the manifold results could not have been compiled.

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Acknowledgements

The following two studies were supported by grants from the the German Social Accident Insurance (DGUV), Sankt Augustin, Germany:

The German Spine Study EPILIFT—Epidemiological case–control study to investigate dose–response relationships in occupational disease 2108;

The German Spine Study 2 (EPILIFT2)—Extended evaluation of the German Spine Study with the aim of deriving appropriate reference values.

The MEGAPHYS joint project—Multilevel hazard analysis of physical exposures at work—was supported by grants from the Federal Institute for Occupational Safety and Health (BAuA), Dortmund, Germany, and from the German Social Accident Insurance (DGUV), Sankt Augustin, Germany.

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    Matthias Jäger

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Jäger, M. (2023). Biomechanical Evaluation—Criteria of Overload. In: The Dortmund Lumbar Load Atlas. Springer, Cham. https://doi.org/10.1007/978-3-031-06349-7_5

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