Within- and between-day reliability of trunk mechanical behaviors estimated using position-controlled perturbations

Details

• Personal Author:
  Bazrgari B ; Hendershot BD ; Madigan ML ; Nussbaum MA
• Description:
  Recent applications of position-controlled perturbation techniques to the human trunk have allowed separate estimation of intrinsic and reflexive trunk mechanical behaviors. These mechanical behaviors play an important role in spinal stability and have been associated with low back pain risk, yet the reliability of these measures remains unknown. Therefore, the objective of the current study was to assess within- and between-day reliability of several measures of trunk mechanical behaviors obtained from position-controlled trunk perturbations. A secondary objective was to assess if different harness designs, used to connect a participant to the perturbing device, influenced reliability. Data were analyzed from baseline measurements obtained from two previously published studies, and a third unpublished study. The total combined subject pool included 33 healthy young adults (17 M, 16 F). Relative and absolute reliability was quantified using intraclass correlation coefficients (ICCs) and standard errors of measurement (SEM), respectively. Within-day ICCs of intrinsic trunk stiffness (0.84-0.90) and effective mass (0.91-95) were excellent, and were generally higher than ICCs for reflex gain (0.55-0.85), maximum reflex force (0.65-0.85), and timing of maximum reflex force (0.48-0.86). Within-day ICCs (0.48-0.95) were consistently superior to between-day values (0.19-0.72). Improvements in harness design increased both within- and between-day reliability and reduced SEMs for most measures. [Description provided by NIOSH]
• Subjects:
  Behavior Biomechanical Phenomena Men Musculoskeletal Diseases Musculoskeletal System Occupational Health Risk Assessment Risk Factors Safety Women
• Keywords:
  Author Keywords: Reliability Back-injuries Biomechanical-modeling Biomechanics Exposure-levels Harnesses Humans Mechanics Physiological-effects Physiological-function Physiological-response Physiology Position Perturbation Posture Reflex Risk-factors Stiffness Thorax Trunk

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• ISSN:
  0021-9290
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Kentucky ; OSHA Region 3 ; OSHA Region 4 ; Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  45
• Issue:
  11
• NIOSHTIC Number:
  nn:20041912
• Citation:
  J Biomech 2012 Jul; 45(11):2019-2022
• Contact Point Address:
  Maury A. Nussbaum, Virginia Tech, Wake Forest School of Biomedical Engineering and Sciences, Virginia Tech, Blacksburg, VA 24061
• Email:
  nussbaum@vt.edu
• Federal Fiscal Year:
  2012
• Performing Organization:
  Virginia Polytechnic Institute and State University
• Peer Reviewed:
  True
• Start Date:
  20060801
• Source Full Name:
  Journal of Biomechanics
• End Date:
  20120731
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:2dec933e2198ecd3043452918637f3ac4e5b293c226783b132b64c6a377d3631449ff28c3f9daf78df79fe911f6a1303696fbfda4793e7b6059b2b159e29343e
• Download URL:
  https://stacks.cdc.gov/view/cdc/194329/cdc_194329_DS1.pdf
• File Type:
  [PDF - 131.12 KB ]