The effects of low-frequency vibrations on hepatic profile of blood |
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Authors: | Z Damijan |
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Institution: | (1) AGH - University of Science and Technology, Department of Mechanics and Vibroacoustics Faculty of Mechanical Engineering and Robotics, Al. Mickiewicza 30, 30-059 Krakow, Poland |
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Abstract: | Body vibrations training has become popular in sports
training, fitness activity, it is still a rare form of physical
rehabilitation.. Vibrations are transmitted onto the whole body or some body
parts of an exercising person via a vibration platform subjected to
mechanical vertical vibrations. During the training session a participant
has to maintain his body position or do exercises that engage specific
muscles whilst vibrations of the platform are transmitted onto the person's
body. This paper is the continuation of the earlier study covering the
effects of low-frequency vibrations on selected physiological parameters of
the human body. The experiments were conducted to find the answer to the
question if vibration exposure (total duration of training sessions 6 hours
20 min) should produce any changes in hepatic profile of blood. Therefore a
research program was undertaken at the University of Science and Technology
AGH – UST to investigate the effects of low-frequency vibration on selected
parameters of hepatic profile of human blood. Cyclic fluctuations of bone
loading were induced by the applied harmonic vibration 3.5 Hz and amplitude
0.004 m. The experiments utilizing two vibrating platforms were performed in
the Laboratory of Structural Acoustics and Biomedical Engineering AGH-UST.
The applied vibrations were harmless and not annoying, in accordance with
the standard PN-EN ISO 130901-1, 1998. 23 women volunteers had 19 sessions
on subsequent working days, at the same time of day. during the tests the
participants remained in the standing position, passive. The main hypothesis
has it that short-term low-frequency vibration exposure might bring about
the changes of the hepatic profile of blood, including: bilirubin
(BILIRUBIN), alkaline phosphatase (Alp), alanine aminotransferase (ALT),
aspartate aminotransferase (AST) and albumin (ALBUMIN) levels. Research data
indicate the low-frequency vibrations exposure produces statistically
significant decrease of bilirubin level umol/l] in blood serum from 14.05
to 9.70 for 82% of participants, the probability level being p = 0.000041. |
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