Belastung des Muskel-Skelett-Systems beim Ziehen und Schieben von Müllgroßbehältern

Human Body Mechanics of Pushing and Pulling: Analyzing the Factors of Task-related Strain on the Musculoskeletal System

“…Frequency of task, task duration, and intensity, as well as population characteristics or the ambient temperature can influence the acceptable workload [3], [32], [33]. The proposed limits for maximum EHFs decrease from around 430N to less than 200N when task frequency augments from one per 8 hours to one per minute [2], [34]. Other limits like the widely acknowledged value for maximum working L5–S1 intervertebral disc compression of 3,400N are usually meant to be valid for young and healthy men.…”

“…Following a more detailed assessment one study [17] was excluded due to similar content to a second study by the same author [2] and another one because it primarily focused on sex differences [18] . There were studies excluded for not meeting the inclusion criteria ( Table 5 ) [5] , [17] , [18] , [19] , [20] , [21] , [22] , [23] , [24] , [25] . Thirteen studies were retained after reading the whole paper and submitted to assessment of their methodological quality ( Table 1 ).…”

“…Some studies showed results that have been derived psychophysically by using the concept of maximum acceptable force (MAF) to quantify global physical strain [2], [3], [8], [14]. The values for an acceptable force level are obtained when the individuals’ perception of the task (acceptable strain) meets specific additional information (e.g., single task performed once in an 8-hour shift) [14].…”

“…Industrial workspaces have mostly been redesigned to replace the carrying of objects by tasks that require pushing or pulling [1] . According to literature, these tasks could end up leading to the development of musculoskeletal disorders (MSDs), presumably due to high loads and/or frequent task repetition [2] , [3] . A current analysis in the automotive supply sector has shown that about 10% of all working processes involve pushing and pulling on a regular and repetitive basis, with a great share (41.2%) requiring the manipulation of objects with total masses between 200 kg and 1,000 kg [4] .…”

“…Conclusions from task intensity on biomechanical strain are drawn by body segment models that calculate estimates of torques, compressions, and shear forces [2] , [8] , [9] , [10] , [11] , [12] , [13] . Some studies showed results that have been derived psychophysically by using the concept of maximum acceptable force (MAF) to quantify global physical strain [2] , [3] , [8] , [14] . The values for an acceptable force level are obtained when the individuals’ perception of the task (acceptable strain) meets specific additional information (e.g., single task performed once in an 8-hour shift) [14] .…”