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In the unloaded lower leg, vibration extrudes venous blood out of the calf muscles probably by direct acceleration and without arterial vasodilation

Zange, Jochen and Molitor, Sven and Illbruck, Agnes and Müller, Klaus and Schönau, Eckhard and Kohl-Bareis, Matthias and Rittweger, Jörn (2014) In the unloaded lower leg, vibration extrudes venous blood out of the calf muscles probably by direct acceleration and without arterial vasodilation. European Journal of Applied Physiology, 114 (5), pp. 1005-1012. Springer. DOI: 10.1007/s00421-014-2834-9 ISSN 1439-6319

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Abstract

Purpose During vibration of the whole unloaded lower leg, effects on capillary blood content and blood oxygenation were measured in the calf muscle. The hypotheses predicted extrusion of venous blood by a tonic reflex contraction and that reactive hyperaemia could be observed after vibration. Methods T welve male subjects sat in front of a vibration platform with their right foot affixed to the platform. In four intervals of 3-min duration vibration was applied with a peak-to-peak displacement of 5 mm at frequencies 15 or 25 Hz, and two foot positions, respectively. Near infrared spectroscopy was used for measuring haemoglobin oxygen saturation (SmO2) and the concentration of total haemoglobin (tHb) in the medial gastrocnemius muscle. Results Within 30 s of vibration SmO2 increased from 55 ± 1 to 66 ± 1 % (mean ± SE). Within 1.5 min afterwards SmO2 decreased to a steady state (62 ± 1 %). During the following 3 min of recovery SmO2 slowly decreased back to base line. THb decreased within the first 30 s of vibration, remained almost constant until the end of vibration, and slowly recovered to baseline afterwards. No significant differences were found for the two vibration frequencies and the two foot positions. Conclusions T he relaxed and unloaded calf muscles did not respond to vibration with a remarkable reflex contraction. The acceleration by vibration apparently ejected capillary venous blood from the muscle. Subsequent recovery did not match with a reactive hyperaemia indicating that the mere mechanical stress did not cause vasodilation.

Item URL in elib:https://elib.dlr.de/88835/
Document Type:Article
Title:In the unloaded lower leg, vibration extrudes venous blood out of the calf muscles probably by direct acceleration and without arterial vasodilation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Zange, JochenGerman Aerospace Center (DLR), Institute of Aerospace Medicine, Space Physiology, Cologne, Germany and Medical Faculty of the University of Cologne, Cologne, Germany; jochen.zange (at) dlr.deUNSPECIFIED
Molitor, SvenInstitute of Aerospace Medicine, Deutsches Zentrum für Luft- und Raumfahrt, DLR e.V., Cologne, GermanyUNSPECIFIED
Illbruck, AgnesInstitute of Aerospace Medicine, Deutsches Zentrum für Luft- und Raumfahrt, DLR e.V., Cologne, Germany and University of Applied Sciences Koblenz, Rhein Ahr Campus Remagen, Remagen, GermanyUNSPECIFIED
Müller, KlausInstitute of Aerospace Medicine, Deutsches Zentrum für Luft- und Raumfahrt, DLR e.V., Cologne, GermanyUNSPECIFIED
Schönau, EckhardUniversity of Cologne, University Children Hospital, Cologne, GermanyUNSPECIFIED
Kohl-Bareis, MatthiasUniversity of Applied Sciences Koblenz, Rhein Ahr Campus Remagen, Remagen, GermanyUNSPECIFIED
Rittweger, JörnInstitute of Aerospace Medicine, Deutsches Zentrum für Luft- und Raumfahrt, DLR e.V., Cologne, Germany and Medical Faculty, University of Cologne, Cologne, Germany; joern.rittweger (at) dlr.deUNSPECIFIED
Date:5 May 2014
Journal or Publication Title:European Journal of Applied Physiology
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:114
DOI :10.1007/s00421-014-2834-9
Page Range:pp. 1005-1012
Publisher:Springer
ISSN:1439-6319
Status:Published
Keywords:Near infrared spectroscopy, Microcirculation, Whole body vibration, Tonic vibration reflex, Vasomotor control
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Effects of Mikro-g und Hyper-g
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Space Physiology
Deposited By: Becker, Christine
Deposited On:15 Apr 2014 09:53
Last Modified:06 Sep 2019 15:25

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