Effects of gloves and pulling task on achievable downward pull forces on a rung
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Effects of gloves and pulling task on achievable downward pull forces on a rung

Filetype[PDF-424.46 KB]


  • English
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    Details:

    • Alternative Title:
      Hum Factors
    • Personal Author:
    • Description:
      Objective:

      This study examined the impacts of pulling task (breakaway and pull-down tasks at different postures), glove use, and their interaction on achievable downward pull forces from a ladder rung.

      Background:

      Posture, glove use and the type of pulling task are known to impact the achievable forces. However, a gap in the literature exists regarding how these factors affect achievable downward pulling forces, which are relevant to recovery from a perturbation during ladder climbing.

      Methods:

      Forty subjects completed four downward pulling tasks (breakaway force; pull force at maximum height, shoulder height and a middle height), using three glove conditions with varying coefficient of friction (COF) levels (cotton glove, low COF; bare hand, moderate COF; and latex-coated glove, high COF) with their dominant and non-dominant hand. The outcome variable was the maximum force normalized to body weight.

      Results:

      The highest forces were observed for highest hand postures (breakaway and maximum height). Increased COF led to higher forces and had a larger effect on breakaway force than the other tasks. The dominant hand was associated with higher forces than the non-dominant hand. Male subjects generated greater forces than female subjects, particularly for higher hand positions.

      Conclusion:

      This study suggests that higher hand position on the ladder, while avoiding low-friction gloves, may be effective for improving recovery from ladder perturbations.

      Application:

      This study may guide preferred climbing strategies (particularly those that lead to a higher hand position) for improving recovery from a perturbation during ladder climbing.

    • Subjects:
    • Source:
      Hum Factors. 60(2):191-200
    • Pubmed ID:
      29161154
    • Pubmed Central ID:
      PMC8829586
    • Document Type:
      Journal Article
    • Funding:
      R21 OH010038/OH/NIOSH CDC HHSUnited States/
    • Collection(s):
    • Main Document Checksum:
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    • File Type:

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