TitleThe effect of a multi-axis suspension on whole body vibration exposures and physical stress in the neck and low back in agricultural tractor applications
Publication TypeJournal Article
Year of Publication2018
AuthorsKim, JH, Dennerlein, JT, Johnson, PW
JournalApplied Ergonomics
Volume68
Pagination80 - 89
Date PublishedJan-04-2018
ISSN00036870
Abstract
 

Highlights

• Two different suspension systems were evaluated for agricultural tractor applications.

• The multi-axial suspension seat showed lower WBV exposure and associated biomechanical responses than the single-axial suspension seat.

• The multi-axial suspension seat may further reduce WBV exposure and associated muscular loading among agricultural vehicle operators.

Whole body vibration (WBV) exposures are often predominant in the fore-aft (x) or lateral (y) axis among off-road agricultural vehicles. However, as the current industry standard seats are designed to reduce mainly vertical (z) axis WBV exposures, they may be less effective in reducing drivers' exposure to multi-axial WBV. Therefore, this laboratory-based study aimed to determine the differences between a single-axial (vertical) and multi-axial (vertical + lateral) suspension seat in reducing WBV exposures, head acceleration, self-reported discomfort, and muscle activity (electromyography) of the major muscle of the low back, neck and shoulders. The results showed that the multi-axial suspension seat had significantly lower WBV exposures compared to the single-axial suspension seats (p' < 0.04). Similarly, the multi-axial suspension seat had lower head acceleration and muscle activity of the neck, shoulder, and low back compared to the single-axial suspension seat; some but not all of the differences were statistically significant. These results indicate that the multi-axial suspension seat may reduce the lateral WBV exposures and associated muscular loading in the neck and low back in agricultural vehicle operators.

URLhttp://www.sciencedirect.com/science/article/pii/S000368701730248X
DOI10.1016/j.apergo.2017.10.021
Short TitleApplied Ergonomics
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