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Mining Publication: Effects of Posture on Back Strength and Lifting Capacity
Keywords: Back Kneeling Lifting or lowering Standing
This page is archived for historical purposes and is no longer being maintained or updated. Contact NIOSH Mining if you need an accessible version.
Original creation date: September 1997
Authors: S Gallagher, TG Bobick
Book Chapter - September 1997
Download PDF Document (0.31 MB)
NIOSHTIC2 Number: 20023255
Ergonomics and Musculoskeletal Disorders: Research on Manual Materials Handling, 1983-1996, W Karwowski; MS Wogalter; PG Dempsey, eds., 1997 Sep; :37-41
The Bureau of Mines performed a pilot study examining the effects of posture on back strength and Maximum Acceptable Weight of Lift (MAWL) on six healthy male subjects (M = 32 years + 4 SD). Six back strength measurements (3 static and 3 dynamic) were made while the subjects were kneeling and standing. In addition, these subjects (who were unaccustomed to lifting in these postures) volunteered to participate in a study of psychophysically determined MAWL in both postures. Results of the back strength tests showed a significantly lower peak torque per body weight output in kneeling versus standing back strength measurements for five out of six test comparisons (p < .05). Subjective estimates of lifting capacity in the kneeling posture were significantly lower than those for the stooped posture (p < .05). The results of back strength and lifting capacity in these two postures provide useful information to consider in determining the physiological and psychophysical stresses imposed by these work postures.
Image of publication Effects of Posture on Back Strength and Lifting CapacityBook Chapter - September 1997
Download PDF Document (0.31 MB)
NIOSHTIC2 Number: 20023255
Ergonomics and Musculoskeletal Disorders: Research on Manual Materials Handling, 1983-1996, W Karwowski; MS Wogalter; PG Dempsey, eds., 1997 Sep; :37-41
See Also
Biomechanical Modeling of Asymmetric Lifting Tasks in Constrained Lifting Postures
A Comparison of Fatigue Failure Responses of Old Versus Middle-Aged Lumbar Motion Segments in Simulated Flexed Lifting
Effects of Lifting in Four Restricted Postures
Effects of Posture on Dynamic Back Loading During a Cable Lifting Task
The Effects of Restricted Workspace on Lumbar Spine Loading
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
Torso Flexion Loads and Fatigue Failure Mode of Human Lumbosacral Motion Segments
Trunk Extension Strength and Muscle Activity in Standing and Kneeling Postures
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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