The influence of lumbar extensor muscle fatigue on lumbar-pelvic coordination during weightlifting

Details

• Personal Author:
  Hu B ; Ning X
• Description:
  Lumbar muscle fatigue is a potential risk factor for the development of low back pain. In this study, we investigated the influence of lumbar extensor muscle fatigue on lumbar-pelvic coordination patterns during weightlifting. Each of the 15 male subjects performed five repetitions of weightlifting tasks both before and after a lumbar extensor muscle fatiguing protocol. Lumbar muscle electromyography was collected to assess fatigue. Trunk kinematics was recorded to calculate lumbar-pelvic continuous relative phase (CRP) and CRP variability. Results showed that fatigue significantly reduced the average lumbar-pelvic CRP value (from 0.33 to 0.29 rad) during weightlifting. The average CRP variability reduced from 0.17 to 0.15 rad, yet this change was statistically not significant. Further analyses also discovered elevated spinal loading during weightlifting after the development of lumbar extensor muscle fatigue. Our results suggest that frequently experienced lumbar extensor muscle fatigue should be avoided in an occupational environment. Practitioner Summary: Lumbar extensor muscle fatigue generates more in-phase lumbar-pelvic coordination patterns and elevated spinal loading during lifting. Such increase in spinal loading may indicate higher risk of back injury. Our results suggest that frequently experienced lumbar muscle fatigue should be avoided to reduce the risk of LBP. [Description provided by NIOSH]
• Subjects:
  Fatigue Men Musculoskeletal Diseases Musculoskeletal System Occupational Health Safety
• Keywords:
  Author Keywords: Lumbar Extensor Muscle Fatigue Back Injuries Back Pain Continuous Relative Phase Electromyography Humans Lifting Lifting Capacity Low Back Disorders Low Back Pain Lumbar-pelvic Coordination Manual Lifting MSD Muscle Function Muscles Musculoskeletal Disorders Musculoskeletal System Disorders Weight Factors

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• ISSN:
  0014-0139
• 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
• Volume:
  58
• Issue:
  8
• NIOSHTIC Number:
  nn:20049354
• Citation:
  Ergonomics 2015 Aug; 58(8):1424-1432
• Contact Point Address:
  Xiaopeng Ning, Department of Industrial and Management Systems Engineering, West Virginia University, Morgantown, WV 26506
• Email:
  xiaopeng.ning@mail.wvu.edu
• Federal Fiscal Year:
  2015
• Performing Organization:
  West Virginia University
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Ergonomics
• End Date:
  20250630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:1cfc313a0498fb1076caa8a3901aeb5c9067b84e52d003ca6b16c3377cf4842a36b62e86016ddd10592810553d7509c93309cf6768ea15c804da17a0d9d1d0ff
• Download URL:
  https://stacks.cdc.gov/view/cdc/203820/cdc_203820_DS1.pdf
• File Type:
  [PDF - 723.00 KB ]