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Examining the Interaction of Force and Repetition on Musculoskeletal Disorder Risk: A Systematic Literature Review
  • Published Date:
    Feb 2013
  • Source:
    Hum Factors. 2012; 55(1):108-124.
Filetype[PDF - 1.06 MB]


Details:
  • Pubmed ID:
    23516797
  • Pubmed Central ID:
    PMC4495348
  • Funding:
    CC999999/Intramural CDC HHS/United States
  • Document Type:
  • Description:
    Objective

    Our aims were (a) to perform a systematic literature review of epidemiological studies that examined the interaction of force and repetition with respect to musculoskeletal disorder (MSD) risk, (b) to assess the relationship of force and repetition in fatigue failure studies of musculoskeletal tissues, and (c) to synthesize these findings.

    Background

    Many epidemiological studies have examined the effects of force and repetition on MSD risk; however, relatively few have examined the interaction between these risk factors.

    Method

    In a literature search, we identified 12 studies that allowed evaluation of a force−repetition interaction with respect to MSD risk. Identified studies were subjected to a methodological quality assessment and critical review. We evaluated laboratory studies of fatigue failure to examine tissue failure responses to force and repetition.

    Results

    Of the 12 epidemiological studies that tested a Force × Repetition interaction, 10 reported evidence of interaction. Based on these results, the suggestion is made that force and repetition may be interdependent in terms of their influence on MSD risk. Fatigue failure studies of musculoskeletal tissues show a pattern of failure that mirrors the MSD risk observed in epidemiological studies.

    Conclusions

    Evidence suggests that there may be interdependence between force and repetition with respect to MSD risk. Repetition seems to result in modest increases in risk for low−force tasks but rapid increases in risk for high−force tasks. This interaction may be representative of a fatigue failure process in affected tissues.