Effects of Gloves and Pulling Task on Achievable Downward Pull Forces on a Rung

Details

• Personal Author:
  Beschorner KE ; Pliner EM ; Seo NJ ; Slota GP ; Spaho E
• Description:
  Objective: We 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 affect 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 nondominant hand. The outcome variable was the maximum force normalized to body weight. Results: The highest forces were observed for the 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 nondominant hand. Male subjects generated greater forces than female subjects, particularly for higher hand positions. Conclusion: This study suggests that a 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. [Description provided by NIOSH]
• Subjects:
  Biomechanical Phenomena Men Musculoskeletal System Occupational Health Personal Protective Equipment Protective Clothing Safety Women
• Keywords:
  Author Keywords: Hand Forces Biomechanics Climbing Falls Force Gloves Hand Protection Humans Ladder Climbing Ladders Physiological Function Physiology Posture Pull Strength Task Performance

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• ISSN:
  0018-7208
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; OSHA Region 4 ; OSHA Region 5 ; Pennsylvania ; South Carolina ; Wisconsin
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  191-200
• Volume:
  60
• Issue:
  2
• NIOSHTIC Number:
  nn:20055188
• Citation:
  Hum Factors 2018 Mar; 60(2):191-200
• Contact Point Address:
  Kurt E. Beschorner, Department of Bioengineering, University of Pittsburgh, 3700 O'hara St., Pittsburgh, PA 15261
• Email:
  beschorn@pitt.edu
• Federal Fiscal Year:
  2018
• Performing Organization:
  University of Wisconsin at Milwaukee
• Peer Reviewed:
  True
• Start Date:
  20120901
• Source Full Name:
  Human Factors
• End Date:
  20150831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:bef49e338e339b1f18442c0434553ae7990e5afb45de6d9272fd1862e4ef1ce6333181dd3d72c6480f04446ae28625a4f8c0ef798311403e368545f33f28921a
• Download URL:
  https://stacks.cdc.gov/view/cdc/217546/cdc_217546_DS1.pdf
• File Type:
  [PDF - 404.02 KB ]