Joint Loading, Muscle Co-Contraction, Ligament Force and Peak Knee Contact Forces When Walking on Railroad Ballast

Details

• Personal Author:
  Bloswick, Donald S. ; Merryweather, Andrew S. ; Xu, Hang
• Description:
  Knee contact force (KCF), muscle co-contraction and ligament forces at the knee were determined for eight railroad workers walking on ballast. Independent variables included: surface condition [no ballast (NB), walking ballast (WB), mainline ballast (MB)], configuration (level, 7 degrees lateral slant), and uphill/downhill limb. KCF was not affected by surface condition or surface configuration. Muscle co-contraction was higher for WB than NB, and higher in the uphill than downhill limb. First peak KCF in the anterior cruciate and medial collateral ligaments were higher and second peak KCF in the lateral collateral ligament were higher in the lateral slant condition than the level condition. Force in the medial collateral ligament was higher for the uphill than for downhill limb. Force in the anterior cruciate and lateral collateral ligaments was higher for downhill than uphill. This suggests that railroad worker gait may include compensatory mechanisms to reduce peak KCFs and knee instability. [Description provided by NIOSH]
• Subjects:
  Biomechanical Phenomena Occupational Health Safety
• Keywords:
  Author Keywords: Railroad Ballast Biomechanical Modeling Biomechanics Body Mechanics Compensatory Mechanisms Downhill Walking Joint Loading Knee Contact Force Knee Instability Ligament Force Ligaments Motion Studies Muscle Co-contraction Peak KCF Railroad Workers Railway Workers Uphill Walking Walking On Ballast Walking Surfaces Worker Gait

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• ISSN:
  1742-5549
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 8 ; Utah
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  15 pdf pages
• Volume:
  4
• Issue:
  2
• NIOSHTIC Number:
  nn:20067382
• Citation:
  Int J Hum Factors Model Simul 2014 Jul; 4(2):87-101
• Contact Point Address:
  Andrew S. Merryweather, Department of Mechanical Engineering, University of Utah, 50 S Central Campus Dr, Rm 2110, Salt Lake City, UT, USA
• Email:
  a.merryweather@utah.edu
• Federal Fiscal Year:
  2014
• Performing Organization:
  University of Utah
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  International Journal of Human Factors Modelling and Simulation
• End Date:
  20280630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:351872ccc0fee77f62b1ddcbc72513b761cdf6c414cc62d4a3cc232f6e5d7f08f37b08d84bc8338aa7d8e2299333b389004be28f06370d7b41a98eefebfc98e6
• Download URL:
  https://stacks.cdc.gov/view/cdc/230621/cdc_230621_DS1.pdf
• File Type:
  [PDF - 1.01 MB ]