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Effects of posture on back strength and lifting capacity.

Authors
Gallagher S; Bobick TG
Source
Ergonomics and musculoskeletal disorders: research on manual materials handling, 1983-1996. Karwowski W, Wogalter MS, Dempsey PG, eds. Santa Monica, CA: Human Factors and Ergonomics Society, 1997 Sep; :37-41
Link
NIOSHTIC No.
20023255
Abstract
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.
Keywords
Back-injuries; Materials-handling; Posture; Muscles; Miners; Coal-miners; Mining-industry; Low-seam-coal-mines; Manual-lifting; Materials-handling
Publication Date
19970901
Document Type
Conference/Symposia Proceedings
Editors
Karwowski-W; Wogalter-MS; Dempsey-PG
Fiscal Year
1997
NTIS Accession No.
NTIS Price
ISBN No.
9780945289098
NIOSH Division
PRC
Source Name
Ergonomics and musculoskeletal disorders: research on manual materials handling, 1983-1996.
State
PA
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