Die „Revidierten Dortmunder Richtwerte“

Jäger, Matthias

doi:10.1007/s40664-019-0356-3

Cited by 8 publications

(7 citation statements)

References 92 publications

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“…Occasionally, this resulted in measurements reporting a short-term overrun of the above guideline values (about 0.1% of instances). According to the Dortmund guidelines of Jäger et al [118], these compression forces should not exceed 5.4 kN in men between 20 and 30 years of age. For men up to 40 years old, this guideline is 4.1 kN; up to 60 years old, 2.2 kN.…”

Section: Resultsmentioning

confidence: 99%

“…This is done by applying biomechanical models [103,117]. For the assessment of short-term exposure through manual handling of loads, the Dortmund Guidelines [118] apply, which provide age and gender-specific recommendations for lumbar disc pressure. The lumbar spine external moment is calculated based on weight handled, posture, and weight of the individual participant.…”

Section: Methods For Measurements and Evaluation: Owas And Cuelamentioning

confidence: 99%

See 1 more Smart Citation

Logistics Work, Ergonomics and Social Sustainability: Empirical Musculoskeletal System Strain Assessment in Retail Intralogistics

et al. 2021

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Background: A large proportion of logistics jobs still rely on manual labor and therefore place a physical strain on employees. This includes the handling of heavy goods and physiologically unfavorable postures. Such issues pose a risk for employee health and work capability. This article provides a detailed empirical analysis and a decision process structure for the allocation of ergonomic measures in warehousing and intralogistics processes. Methods: The methodological basis is a load assessment of the musculoskeletal system in retail intralogistics. Based on the established measurements systems CUELA and OWAS, the specific loads on employees are assessed for four typical logistics workplace settings. These are combined with standards for efficient decision rules regarding contracting and developing ergonomic improvements. Results: The results suggest an increased risk of long-term low back injury for the selected four standard work situations in warehousing and likely apply to similar work environments in logistics. Using measures, posture descriptions, and international standards, we show how already few threshold values serve as sufficient conditions to decide if ergonomic interventions are required. Conclusions: The specific contribution is characterized by the combination of literature review results, empirical results, and the identification and discussion of specific mitigation measures. These elements are focused on the highly relevant ergonomic situation of logistics workers and present a unique contribution towards the knowledge base in this field due to the multi-perspective approach.

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Section: Resultsmentioning

confidence: 99%

Section: Methods For Measurements and Evaluation: Owas And Cuelamentioning

confidence: 99%

Logistics Work, Ergonomics and Social Sustainability: Empirical Musculoskeletal System Strain Assessment in Retail Intralogistics

et al. 2021

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“…For the lower back, there are safety limits available (guideline values), the so-called “Revised Dortmund Recommendations” [ 59 ]. The average maximum compression force in the L4/L5 segment was 3.2 ± 0.7 kN in our simulations.…”

Section: Discussionmentioning

confidence: 99%

“…The average maximum compression force in the L4/L5 segment was 3.2 ± 0.7 kN in our simulations. This loading is not recommended for men over 50 or women over 40 years of age (guideline boundary value: 3.1 kN), which illustrates relatively high stress on the lower back [ 59 ]. MAs in the back (35 ± 3%s) and abdomen (36 ± 6%s) were also relatively high.…”

Section: Discussionmentioning

confidence: 99%

Model-Based Biomechanical Exoskeleton Concept Optimization for a Representative Lifting Task in Logistics

Schiebl

Tröster

Idoudi

et al. 2022

IJERPH

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Occupational exoskeletons are a promising solution to prevent work-related musculoskeletal disorders (WMSDs). However, there are no established systems that support heavy lifting to shoulder height. Thus, this work presents a model-based analysis of heavy lifting activities and subsequent exoskeleton concept optimization. Six motion sequences were captured in the laboratory for three subjects and analyzed in multibody simulations with respect to muscle activities (MAs) and joint forces (JFs). The most strenuous sequence was selected and utilized in further simulations of a human model connected to 32 exoskeleton concept variants. Six simulated concepts were compared concerning occurring JFs and MAs as well as interaction loads in the exoskeleton arm interfaces. Symmetric uplifting of a 21 kg box from hip to shoulder height was identified as the most strenuous motion sequence with highly loaded arms, shoulders, and back. Six concept variants reduced mean JFs (spine: >70%, glenohumeral joint: >69%) and MAs (back: >63%, shoulder: >59% in five concepts). Parasitic loads in the arm bracing varied strongly among variants. An exoskeleton design was identified that effectively supports heavy lifting, combining high musculoskeletal relief and low parasitic loads. The applied workflow can help developers in the optimization of exoskeletons.

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“…High mechanical loads on the spine represent one of the main factors causing back pain, for example, as the result of lifting tasks or carrying heavy loads [1]. Acute low back pain is prevalent and, especially when it becomes chronic, is a major cause of absence from work [2,3].…”

Section: Introductionmentioning

confidence: 99%

In vitro study design derived from an in vivo lifting task

Brenzel,

Johnen,

Praster

et al. 2023

Proc Appl Math and Mech

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Biomechanical properties of the spinal tissue constituents, especially in the intervertebral disc (IVD), contribute to disability and high costs. The IVD is considered to be one of the main etiologies of chronic low back pain. Changes in the biomechanical properties of the spine, especially in the IVD, are related to multiple factors such as type and duration of loading, recovery periods, osmosis, relaxation, and diffusion processes. To quantify spinal burden in vivo, various dose models have been developed in the context of ergonomics research. In our work both in vivo and in vitro studies were conducted to investigate the effects of loading and rest periods alteration on mechanical properties of the spine. A multibody simulation (MBS) was used to translate the collected motion data from the in vivo study into forces and moments as boundary conditions for the in vitro study. An in vitro spine test rig is used to apply axial compression forces and pure moment loading in flexion/extension direction to spinal segments according to the conditions that have been determined in the MBS. In this article, an approach is presented to coordinate the boundary conditions in vivo and in vitro in order to carry out a holistic investigation. In addition, it is shown why cyclic preconditioning seems to be a more suitable preparation of the samples compared to a constant one in this experimental context.

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Die „Revidierten Dortmunder Richtwerte“

Cited by 8 publications

References 92 publications

Logistics Work, Ergonomics and Social Sustainability: Empirical Musculoskeletal System Strain Assessment in Retail Intralogistics

Logistics Work, Ergonomics and Social Sustainability: Empirical Musculoskeletal System Strain Assessment in Retail Intralogistics

Model-Based Biomechanical Exoskeleton Concept Optimization for a Representative Lifting Task in Logistics

In vitro study design derived from an in vivo lifting task

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