Muscular activity of lower limb muscles associated with working on inclined surfaces

Details

• Personal Author:
  Bhattacharyan A ; Kincl, Laurel ; Lowe, Brian D. ; Lu ML ; Succop P
• Description:
  This study investigated the effects of visual cues, muscular fatigue, task performance and experience of working on inclined surfaces on activity of postural muscles in the lower limbs associated with maintaining balance on three inclined surfaces - 0 degrees, 14 degrees and 26 degrees. Normalised electromyographic (NEMG) data were collected in 44 professional roofers bilaterally from the rectus femoris, biceps femoris, tibialii anterior and gastrocnemii medial muscle groups. The 50th and 95th percentile NEMG amplitudes were used as EMG variables. Results showed that inclination angle and task performance caused a significant increase in the NEMG amplitudes of all postural muscles. Visual cues were significantly associated with a decrease in the 95th percentile EMG amplitude for the right gastrocnemius medial and tibialis anterior. Fatigue was related to a significant decrease in the NEMG amplitude for the rectus femoris. Experience of working on inclined surfaces did not have a significant effect on the NEMG amplitude. Practitioner Summary: Increasing angle of the working surface and task performance are two main factors contributing to muscular loading in the lower limb muscles. Input of visual cues while working on inclined surfaces may provide beneficial effects on reducing muscular loading to prevent occupational falls. [Description provided by NIOSH]
• Subjects:
  Body Height Construction Industry Ergonomics Fatigue Musculoskeletal System Occupational Health Safety Workplace
• Keywords:
  Author Keywords: EMG Body Distribution Body Mechanics Body Regions Construction Construction Workers Electrophysiological Examinations Height Factors Humans Inclined Surfaces Injury Prevention Muscle Function Muscle Physiology Muscle Stress Musculoskeletal System Postural Stability Roofers Surface Properties Task Performance Visual Cues Work Environment

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• ISSN:
  0014-0139
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Ohio ; Oregon ; OSHA Region 10 ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DART - Division of Applied Research and Technology
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  278-290
• Volume:
  58
• Issue:
  2
• NIOSHTIC Number:
  nn:20045284
• Citation:
  Ergonomics 2015 Feb; 58(2):278-290
• Contact Point Address:
  Ming-Lun Lu, Taft Laboratories, National Institute for Occupational Safety and Health, 4676 Columbia Parkway, MS C-24, Cincinnati, OH 45226, USA
• Email:
  mlu@cdc.gov
• Federal Fiscal Year:
  2015
• NORA Priority Area:
  Disease and Injury: Low Back Disorders
• Performing Organization:
  University of Cincinnati, College of Medicine, Cincinnati, Ohio
• Peer Reviewed:
  True
• Start Date:
  19960801
• Source Full Name:
  Ergonomics
• End Date:
  20010731
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:12e757c4247ee36fa70381325325e4aa911dfee1f75fa5df78bdafb975e158fb24c0839c7c6ebd21ad09ff3c60ad133106e7076d133f12e2b51bd1e2b3b5dc91
• Download URL:
  https://stacks.cdc.gov/view/cdc/200749/cdc_200749_DS1.pdf
• File Type:
  [PDF - 357.18 KB ]