Factors Involved in Strain-Induced Injury in Skeletal Muscles and Outcomes of Prolonged Exposures

Details

• Personal Author:
  Stauber WT
• Description:
  Repetitive motion disorders can involve lengthening of skeletal muscles to perform braking actions to decelerate limbs under load often resulting in muscle strains and injury. Injury is a loss of isometric force (weakness) requiring days to recover. The capacity of skeletal muscle to tolerate repeated strains is dependent on multiple factors including individual variation. The most important factors producing muscle strain injury are the magnitude of the resisting force (peak-stretch force) and the number of strains. Other factors such as muscle length and fiber type contribute to the susceptibility to injury as well, but to a lesser degree. Strain injury can also lead to inflammation and pain. Chronic exposure to repeated strains can result in fibrosis that is not completely reversed after months of rest. Long rest times appear to be the only factor reported to prevent inflammation in rats following repeated strain injury. Further understanding of the mechanism for prevention of histopathologic changes by long rest times should provide a rationale for prevention of negative outcomes. [Description provided by NIOSH]
• Subjects:
  Engineering Firefighters Fires Metals Mining Occupational Health Safety
• Keywords:
  Exposure Levels Injuries Injury Prevention Motion Studies Muscles Muscle Tissue Musculoskeletal System Repetitive Work Rest Periods Skeletal System
• ISSN:
  1050-6411
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  61-70
• Volume:
  14
• Issue:
  1
• NIOSHTIC Number:
  nn:20029542
• Citation:
  J Electromyogr Kinesiol 2004 Feb; 14(1):61-70
• Contact Point Address:
  Department of Physiology and Pharmacology, West Virginia University, School of Medicine, Robert C. Byrd Health Sciences Center, PO Box 9229, Morgantown, WV 26506-9229, USA
• Email:
  wstauber@hsc.wvu.edu
• Federal Fiscal Year:
  2004
• NORA Priority Area:
  Disease and Injury: Musculoskeletal Disorders of the Upper Extremities
• Performing Organization:
  West Virginia University, Morgantown, West Virginia
• Peer Reviewed:
  True
• Start Date:
  19920101
• Source Full Name:
  Journal of Electromyography and Kinesiology
• End Date:
  20050531
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:e68d001653444443b013d9f3d7fb12dc10b04504ed1006465871f03e0448cc53258648fb48d14a70a8cdbffd1c9f7ca0e46998e2eee0f9132d37c976d63f5193
• Download URL:
  https://stacks.cdc.gov/view/cdc/190497/cdc_190497_DS1.pdf
• File Type:
  [PDF - 381.13 KB ]