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Publication
Effect of whole-body vibration exposures on physiological stresses: Mining heavy
equipment applications.
Authors Kia K, Fitch SM, Newsom SA, Kim JH
Submitted By Submitted Externally on 12/3/2021
Status Published
Journal Applied ergonomics
Year 2020
Date Published 5/1/2020
Volume : Pages 85 : 103065
PubMed Reference 32174353
Abstract The aim of this study was to employ validated biological markers to quantify the
physiologic consequences of exposure to whole-body vibration (WBV) and evaluate
the relative impact of mining vehicle operator vibration exposure on
physiological responses as compared to vertical-axial dominant WBV. In a
laboratory-based study with a repeated-measures design, we played actual
field-measured floor vibration profiles into a 6-degree-of-freedom motion
platform to create different realistic WBV exposures: 1) vertical-dominant
vibration collected from long-haul trucks, 2) multi-axial vibration collected
from mining heavy equipment vehicles, and 3) no vibration (control condition).
Circulating biomarkers of interest were cortisol and catecholamines (epinephrine
and norepinephrine) to assess physiological stress, interleukin-6 (IL-6) and
tumor necrosis factor-a (TNFa) to test for inflammation, thiobarbituric acid
reactive substances (TBARS) to measure oxidative stress, and myoglobin and
plasma creatine kinase to assess muscle damage. We collected blood samples at
pre-exposure (0 h), during-exposure (2 and 4 h), and 2 h into recovery after the
WBV exposure (6 h) in all four exposure conditions. The results showed that a
single, 4-h acute exposure to WBV may not be sufficient to induce skeletal
muscle damage, inflammation or physiologic stress measurable in the blood. No
significant differences were observed between conditions for any of the
biomarkers that could be attributed to the exposure contrast between
vertical-dominant and multi-axial WBV exposures. These findings further indicate
known complications of WBV exposure likely arise secondary to chronic, repeated
exposures that give rise to subclinical stresses that were not captured here.




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