Two linear regression models predicting cumulative dynamic L5/S1 joint moment during a range of lifting tasks based on static postures

Details

• Alternative Title:
  Ergonomics
• Personal Author:
  Xu, Xu ; Chang, Chien-Chi ; Lu, Ming-Lun
• Description:
  Previous studies have indicated that cumulative L5/S1 joint load is a potential risk factor for low back pain. The assessment of cumulative L5/S1 joint load during a field study is challenging due to the difficulty of continuously monitoring the dynamic joint load. This study proposes two regression models predicting cumulative dynamic L5/S1 joint moment based on the static L5/S1 joint moment of a lifting task at lift-off and set-down and the lift duration. Twelve men performed lifting tasks at varying lifting ranges and asymmetric angles in a laboratory environment. The cumulative L5/S1 joint moment was calculated from continuous dynamic L5/S1 moments as the reference for comparison. The static L5/S1 joint moments at lift-off and set-down were measured for the two regression models. The prediction error of the cumulative L5/S1 joint moment was 21 ± 14 Nm × s (12% of the measured cumulative L5/S1 joint moment) and 14 ± 9 Nm × s (8%) for the first and the second models, respectively. Practitioner Summary: The proposed regression models may provide a practical approach for predicting the cumulative dynamic L5/S1 joint loading of a lifting task for field studies since it requires only the lifting duration and the static moments at the lift-off and/or set-down instants of the lift.
• Subjects:
  Analysis Of Variance Biomechanical Phenomena Female Humans Imaging, Three-Dimensional Lifting Linear Models Low Back Pain Lumbar Vertebrae Male Middle Aged Models, Anatomic Posture Sacrum Statistics As Topic Task Performance And Analysis Weight-Bearing

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• Source:
  Ergonomics. 55(9):1093-1103.
• Pubmed ID:
  22803616
• Pubmed Central ID:
  PMC4690458
• Document Type:
  Journal Article
• Funding:
  CC999999/Intramural CDC HHS/United States
• Volume:
  55
• Issue:
  9
• Collection(s):
  CDC Public Access
• Main Document Checksum:
  urn:sha256:02160acb6f5e10dfd9b64a8553d5ef56d7af71ec557ae071de017783a71709d5
• Download URL:
  https://stacks.cdc.gov/view/cdc/37044/cdc_37044_DS1.pdf
• File Type:
  [PDF - 1.28 MB ]