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Psychophysical basis for maximum pushing and pulling forces: a review and recommendations.

Authors
Garg-A; Waters-T; Kapellusch-J; Karwowski-W
Source
Int J Ind Ergon 2014 Mar; 44(2):281-291
NIOSHTIC No.
20041703
Abstract
The objective of this paper was to perform a comprehensive review of psychophysically determined maximum acceptable pushing and pulling forces. Factors affecting pushing and pulling forces are identified and discussed. Recent studies show a significant decrease (compared to previous studies) in maximum acceptable forces for males but not for females when pushing and pulling on a treadmill. A comparison of pushing and pulling forces measured using a high inertia cart with those measured on a treadmill shows that the pushing and pulling forces using high inertia cart are higher for males but are about the same for females. It is concluded that the recommendations of Snook and Ciriello (1991) for pushing and pulling forces are still valid and provide reasonable recommendations for ergonomics practitioners. Regression equations as a function of handle height, frequency of exertion and pushing/pulling distance are provided to estimate maximum initial and sustained forces for pushing and pulling acceptable to 75% male and female workers. At present it is not clear whether pushing or pulling should be favored. Similarly, it is not clear what handle heights would be optimal for pushing and pulling. Epidemiological studies are needed to determine relationships between psychophysically determined maximum acceptable pushing and pulling forces and risk of musculoskeletal injuries, in particular to low back and shoulders. Relevance to industry: This article provides a concise discussion of important factors relevant to designing and analyzing pushing/pulling tasks. Regression equations to estimate initial and sustained pushing and pulling forces acceptable to 75% male and female workers are provided and can be used to design and analyze pushing and pulling tasks common in industry.
Keywords
Musculoskeletal-system; Muscle-physiology; Force; Psychophysiological-testing; Psychophysiology; Men; Women; Sex-factors; Physical-stress; Physical-capacity; Measurement-equipment; Ergonomics; Mathematical-models; Manual-materials-handling; Materials-handling-equipment; Task-performance; Risk-factors; Musculoskeletal-system-disorders; Author Keywords: Maximum acceptable pushing and pulling forces (MAFs); Regression equations to estimate MAFs; Factors affecting pushing and pulling forces; Ergonomic recommendations
Contact
Arun Garg, Industrial & Manufacturing Engineering, Center for Ergonomics, University of Wisconsin-Milwaukee, P.O. Box 784, Milwaukee, WI 53201, USA
Publication Date
20140301
Document Type
Journal Article
Email Address
arun@uwm.edu
Fiscal Year
2014
NTIS Accession No.
NTIS Price
Identifying No.
B20121218A
Issue of Publication
2
ISSN
0169-8141
NIOSH Division
DART
Source Name
International Journal of Industrial Ergonomics
State
WI; OH; FL
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