Local Dynamic Stability Associated with Load Carrying

Details

• Personal Author:
  Liu J ; Lockhart TE
• Description:
  Objectives: Load carrying tasks are recognized as one of the primary occupational factors leading to slip and fall injuries. Nevertheless, the mechanisms associated with load carrying and walking stability remain illusive. The objective of the current study was to apply local dynamic stability measure in walking while carrying a load, and to investigate the possible adaptive gait stability changes. Methods: Current study involved 25 young adults in a biomechanics research laboratory. One tri-axial accelerometer was used to measure three-dimensional low back acceleration during continuous treadmill walking. Local dynamic stability was quantified by the maximum Lyapunov exponent (maxLE) from a nonlinear dynamics approach. Results: Long term maxLE was found to be significant higher under load condition than no-load condition in all three reference axes, indicating the declined local dynamic stability associated with load carrying. Conclusion: Current study confirmed the sensitivity of local dynamic stability measure in load carrying situation. It was concluded that load carrying tasks were associated with declined local dynamic stability, which may result in increased risk of fall accident. This finding has implications in preventing fall accidents associated with occupational load carrying. [Description provided by NIOSH]
• Subjects:
  Accidental Falls Accidents Biomechanical Phenomena Musculoskeletal System Occupational Health Occupational Injuries Safety
• Keywords:
  Accelerometer Author Keywords: Local Dynamic Stability Biomechanics Fall Accidents Falls Load Carrying Muscle Function Occupational Accidents Slips, Trips, And Falls STF
• ISSN:
  2093-7911
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Virginia ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  46-51
• Volume:
  4
• Issue:
  1
• NIOSHTIC Number:
  nn:20055428
• Citation:
  Saf Health Work 2013 Mar; 4(1):46-51
• Contact Point Address:
  Jian Liu, Division of Applied Science & Technology, Marshall University One John Marshall Drive, CB212, Huntington, WV, USA
• Email:
  liuji@marshall.edu
• Federal Fiscal Year:
  2013
• NORA Priority Area:
  Construction ; Services
• Performing Organization:
  Virginia Polytechnic Institute and State University
• Peer Reviewed:
  True
• Start Date:
  20090901
• Source Full Name:
  Safety and Health at Work
• End Date:
  20140831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:7fb30fdd325d2a6a521c93a0f733ef96cac2f2def5901fa2b5a4c0e7776d330491a8e173015c3d01d7838395dda8a3fc03a5ea4da2b2646c0a2ab62bb27693f1
• Download URL:
  https://stacks.cdc.gov/view/cdc/213285/cdc_213285_DS1.pdf
• File Type:
  [PDF - 290.36 KB ]