Mechanical demands on the lower back in patients with non-chronic low back pain during a symmetric lowering and lifting task

Iman Shojaei, Elizabeth G. Salt, Quenten Hooker, Babak Bazrgari

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

There is limited information in the literature related to the lower back loading in patients with LBP, particularly those with non-chronic LBP. Toward addressing such a research gap, a case-control study was conducted to explore the differences in lower back mechanical loads between a group of females (n = 19) with non-chronic, non-specific LBP and a group of asymptomatic females (n = 19). The differences in lower back mechanical loads were determined when participants completed one symmetric lowering and lifting of a 4.5 kg load at their preferred cadence. The axial, shearing, and moment components of task demand at the time of peak moment component as well as measures of peak trunk kinematics were analyzed. Patient vs. asymptomatic group performed the task with smaller peak thoracic rotation and peak lumbar flexion. While no differences in the moment component of task demand on the lower back between the patients and controls were found, the shearing (40–50 age group) and axial components of task demand were, respectively, larger and smaller in patients vs. controls. Whether alterations in lower back loads in patients with non-chronic LBP are in response to pain or preceded the pain, the long-term exposure to abnormal lower back mechanics may adversely affect spinal structure and increase the likelihood of further injury or pain. Therefore, the underlying reason(s) as well as the potential consequence(s) of such altered lower back mechanics in patients with non-chronic LBP should to be further investigated.

Original languageEnglish
Pages (from-to)255-261
Number of pages7
JournalJournal of Biomechanics
Volume70
DOIs
StatePublished - Mar 21 2018

Bibliographical note

Funding Information:
This work was supported in part by the National Center for Research Resources – United States and the National Center for Advancing Translational Sciences – United States [UL1TR000117] as well as an award (R21OH010195) from the Centers for Disease Control and Prevention – United States. The content of this manuscript is solely the responsibility of the authors and does not necessarily represent the official views of the National Institute of Health and the Centers for Disease Control and Prevention – United States.

Funding Information:
This work was supported in part by the National Center for Research Resources – United States and the National Center for Advancing Translational Sciences – United States [ UL1TR000117 ] as well as an award ( R21OH010195 ) from the Centers for Disease Control and Prevention – United States. The content of this manuscript is solely the responsibility of the authors and does not necessarily represent the official views of the National Institute of Health and the Centers for Disease Control and Prevention – United States.

Publisher Copyright:
© 2017 Elsevier Ltd

Keywords

  • Lower back mechanical demand
  • Lowering and lifting task
  • Non-chronic low back pain

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine
  • Biomedical Engineering
  • Rehabilitation

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