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The effect of mailbag design on lateral trunk muscle fatigue.

Authors
Gerber-AH; Bloswick-DS; Johnson-SC
Source
Advances in Industrial Ergonomics and Safety IV. Kumar S, Mital A, eds., New York: Taylor and Francis, 1992 Aug; 4:259-266
Link
NIOSHTIC No.
00218519
Abstract
A study was conducted to determine which mailbag caused less fatigue of the lateral trunk flexors, the conventional bag, a bag with an additional strap around the waist, or a double bag which distributed the weight from each shoulder. Healthy right handed volunteer male subjects were recruited from the University of Utah to participate in this study. They carried three different mailbags during a 1 hour simulated mail delivery route. Use of the waist belt decreased trunk muscle fatigue by symmetrically distributing the load from the mailbag. A significant difference in fatigue scores between the double bag and the side pack with waistbelt was not demonstrated, possibly due to the lack of power calculated for those two trials. While an increase was noted in muscle fatigue when carrying the standard mailbag, a cause and effect relationship was not established between low trunk muscle endurance and low back injuries. The authors indicate a need to identify and correct workplace hazards due to the financial cost musculoskeletal disorders placed on industry and the health care system.
Keywords
NIOSH-Grant; Training; Manual-materials-handling; Back-injuries; Ergonomics; Musculoskeletal-system-disorders; Muscle-function; Muscle-stress; Job-stress; Occupational-hazards
Contact
Rocky MT Ctr/occupa/envir Hlth University of Utah D F C M, Room BC 106 Salt Lake City, Utah 84132
Publication Date
19920801
Document Type
Conference/Symposia Proceedings
Editors
Kumar-S; Mital-A
Funding Amount
7775332
Funding Type
Grant
Fiscal Year
1992
NTIS Accession No.
NTIS Price
ISBN No.
0748400311
Identifying No.
Grant-Number-T15-OH-07141
Priority Area
Musculoskeletal-system-disorders
Source Name
Advances in Industrial Ergonomics and Safety IV. Proceedings of the Annual International Industrial Ergonomics and Safety Conference held in Denver, Colorado, 10-14 June 1992. The Official Conference of the International Foundation for Industrial Ergonomics and Safety Research
State
UT; CO
Performing Organization
University of Utah, Salt Lake City, Utah
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