A Biomechanical Evaluation of Lifting Speed Using Work- and Moment-Related Measures

Details

• Personal Author:
  Ayoub MM ; Bernard TM ; Lin CJ
• Description:
  A biomechanical evaluation of lifting speed was conducted in the laboratory. The study investigated the effects of lifting speed on several predetermined biomechanical cost functions. The lifting tasks consisted of five lifting speeds labelled as the slowest, slow, normal, fast and fastest, and three weights, 50, 65 and 80% of their maximum acceptable weight of lift. The speed at each level was determined individually by each subject according to their capability. The study found that work-related measures, including the total net muscle work, total absolute net muscle work and work done to the load, decreased significantly as the lifting speed increased (p<0.05, <0.001 and <0.001, respectively). The time integral of sum of squared ratio of joint moment and strength also decreased significantly (p<0.001). This indicates that lifting at a faster speed tends to reduce the work the body has to do. The peak speed of load occurred at 70% of total lifting time for the slowest lifts, but at 30% of total lifting time for other lifting speeds. Performing lifts at the minimum speeds changed the usual speed coordination technique the subjects used. [Description provided by NIOSH]
• Subjects:
  Biomechanical Phenomena Musculoskeletal System Occupational Health Safety
• Keywords:
  Acceptable Weight Of Lift Author Keywords: Manual Materials Handling Biomechanics Lifting Speed Manual Lifting Manual Materials Handling Maximum Muscle Function Muscle Physiology Muscles Muscle Tension Musculoskeletal System

  More +
• ISSN:
  0014-0139
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 6 ; Texas
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  42
• Issue:
  8
• NIOSHTIC Number:
  nn:20031288
• Citation:
  Ergonomics 1999 Aug; 42(8):1051-1059
• Contact Point Address:
  Department of Industrial Engineering, Chung Yuan Christian University, Chung Li, Taiwan
• Federal Fiscal Year:
  1999
• NORA Priority Area:
  Disease and Injury: Musculoskeletal Disorders of the Upper Extremities
• Performing Organization:
  Department of Industrial Engineering, Texas Tech University, Lubbock Texas
• Peer Reviewed:
  True
• Start Date:
  19880101
• Source Full Name:
  Ergonomics
• End Date:
  19950831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:7cae7b11bbd592ea5f5a19e29631d514e68e77af35763bd65ff835ca8c6faeec3ea368d8b5c08ef5833bfc48b9e01a37b05f7d3181652171ea943380f72dd784
• Download URL:
  https://stacks.cdc.gov/view/cdc/191582/cdc_191582_DS1.pdf
• File Type:
  [PDF - 898.13 KB ]