Analysis and Measurement of Lumbar Trunk Loads in Tasks Involving Bends and Twists

Details

• Personal Author:
  Andersson GBJ ; Björk R ; Haderspeck K ; Nordin M ; Örtengren R ; Schultz AB ; Andersson GBJ ; Björk R ; Haderspeck K ; Nordin M ; Örtengren R ; Schultz AB
• Description:
  Ten subjects performed isometric weight-holding and force-resisting work tasks while standing upright, both with and without a twist of the trunk; with the trunk bent laterally; and in postures involving combinations of bending and twisting. The lumbar trunk muscle contraction forces and the lumbar spine compression and shear forces imposed by these tasks were predicted using a biomechanical model. Myoelectric activity was recorded quantitatively at eight locations over the back muscles and at four locations over the abdominal wall muscles. Correlation coefficients from 0.67 to 0.88 were found between the predicted muscle contraction forces and the measured myoelectric activities when the predictions were made so as to minimize muscle contraction force per unit area. Trunk twisting and lateral bending were found to load the spine and trunk muscles less than trunk flexion or holding of weights in front of the body. [Description provided by NIOSH]
• Subjects:
  Biomechanical Phenomena Musculoskeletal System Occupational Health Safety
• Keywords:
  Biomechanics Motion Studies Muscle Function Muscles Musculoskeletal System
• ISSN:
  0021-9290
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article ; Journal Article
• Place as Subject:
  Illinois ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH) ; National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health ; Workplace Safety & Health
• Location:
  North America ; North America
• Volume:
  15
• Issue:
  9
• NIOSHTIC Number:
  nn:20061136
• Citation:
  J Biomech 1982 Sep; 15(9):669-675
• Federal Fiscal Year:
  1982
• Performing Organization:
  University of Illinois Chicago Circle, Chicago, Illinois
• Peer Reviewed:
  True
• Start Date:
  19740401
• Source Full Name:
  Journal of Biomechanics
• End Date:
  19860831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:684a3c19046a51b7052a566ec5f278a690a8c3776609720e39b1b4868237e238fcda1b66b99633219f85c24ed931f2b3a6e0e1400ac8cec0e05967d5d38cce75
• Download URL:
  https://stacks.cdc.gov/view/cdc/224782/cdc_224782_DS1.pdf
• File Type:
  [PDF - 597.27 KB ]