The effect of a lower extremity kinematic constraint on lifting biomechanics

Details

• Personal Author:
  Jin S ; Mirka GA ; Jin S ; Mirka GA
• Description:
  Leaning against a stationary barrier during manual materials handling tasks is observed in many industrial environments, but the effects of this kinematic constraint on low back mechanics are unknown. Thirteen participants performed two-handed lifting tasks using both a leaning posture and no leaning posture while trunk kinematics, muscle activity and ground reaction force were monitored. Results revealed that lifting with the leaning posture required significantly less activity in erector spinae (26% vs. 36% MVC) and latissimus dorsi (8% vs. 14% MVC), and less passive tissue moment compared with the no leaning posture. Peak sagittal accelerations were lower when leaning, but the leaning posture also had significantly higher slip potential as measured by required coefficient of friction (0.05 vs. 0.36). The results suggested that the leaning lifting strategy provides reduced low back stress, but does so at the cost of increased slip potential. [Description provided by NIOSH]
• Subjects:
  Biomechanical Phenomena Manufacturing And Industrial Facilities Men Musculoskeletal Diseases Musculoskeletal System Occupational Health Safety Somatotypes Women
• Keywords:
  Author Keywords: Manual Materials Handling Back-injuries Biomechanics Body-distribution Body-mechanics Humans Kinematic Constraints Low Back Manual-materials-handling Materials-handling Muscle-function Muscle-physiology Muscles Musculoskeletal-system Physical-reactions Physiological-effects Physiological-factors Physiological-function Physiological-response Physiology Posture Skeletal-system

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• ISSN:
  0003-6870
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article ; Journal Article
• Place as Subject:
  Iowa ; OSHA Region 7
• CIO:
  National Institute for Occupational Safety and Health (NIOSH) ; National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health ; Workplace Safety & Health
• Location:
  North America ; North America
• Volume:
  42
• Issue:
  6
• NIOSHTIC Number:
  nn:20040118
• Citation:
  Appl Ergon 2011 Nov; 42(6):867-872
• Contact Point Address:
  Sangeun Jin, 3004 Black Engineering BLDG, Iowa State University, Ames, IA, 50011
• Email:
  sjin@iastate.edu
• Federal Fiscal Year:
  2012
• Performing Organization:
  Iowa State University
• Peer Reviewed:
  True
• Start Date:
  20070803
• Source Full Name:
  Applied Ergonomics
• End Date:
  20090731
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:6dd579dd740dbd0af9e58e17bf98a99444c88c73d7d4f7c3b8687a3016b17435a878608b431545d603e436419db71afe822163a923cd9f1293ba1284144492fd
• Download URL:
  https://stacks.cdc.gov/view/cdc/193090/cdc_193090_DS1.pdf
• File Type:
  [PDF - 499.03 KB ]