Mining Publication: Effects of Lifting in Four Restricted Postures
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Original creation date: September 1997
The purpose of this study was to examine the lifting capacity of low-seam coal miners in four restricted work postures (roof heights of 36", 40", 44", and 48"), investigate the associated metabolic costs, and to examine electromyographic (EMG) data from eight trunk muscles during the lifting procedure. Subjects were thirteen underground miners accustomed to handling materials in restricted work postures. Each subject performed two twenty-minute periods of asymmetric lifting in each of four postures during the day of testing. The frequency of lifting was 10 lifts per minute. A specially designed lifting box incorporated microswitches in one handle of the box and another in the bottom of the box, in order to examine the trunk muscle function at specific points during the lifting cycle. The data collected will be used by the Bureau of Mines to make recommendations for lifting materials in low-seam coal mines.
Authors: S Gallagher, RL Unger, EW Rossi
Conference Paper - September 1997
NIOSHTIC2 Number: 20023212
Ergonomics and Musculoskeletal Disorders: Research on Manual Materials Handling, 1983-1996, Karwowski-W; Wogalter-MS; Dempsey-PG, eds., Human Factors and Ergonomics Society, 1997; :56-60
See Also
- Biomechanical Modeling of Asymmetric Lifting Tasks in Constrained Lifting Postures
- Characteristics of Gait in Restricted Vertical Space Versus Unrestricted Walking
- A Comparison of Fatigue Failure Responses of Old Versus Middle-Aged Lumbar Motion Segments in Simulated Flexed Lifting
- Electromyography of the Thigh Muscles during Lifting Tasks in Kneeling and Squatting Postures
- An Exploratory Study of Loading and Morphometric Factors Associated with Specific Failure Modes in Fatigue Testing of Lumbar Motion Segments
- Lifting in Stooped and Kneeling Postures: Effects on Lifting Capacity, Metabolic Cost, and Electromyography of Eight Trunk Muscles
- Technology News 521 - Development of a Mobile Manipulator to Reduce Lifting Accidents
- Torso Flexion Loads and Fatigue Failure Mode of Human Lumbosacral Motion Segments
- Trunk Extension Strength and Muscle Activity in Standing and Kneeling Postures
- Whole-Body Vibration and Postural Stress among Operators of Construction Equipment: A Literature Review
- Page last reviewed: 9/21/2012
- Page last updated: 9/21/2012
- Content source: National Institute for Occupational Safety and Health, Mining Program