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Vibration-related extrusion of capillary blood from the calf musculature depends upon directions of vibration of the leg and of the gravity vector

Cakar, Halil Ibrahim and Dogan, Serfiraz and Kara, Sadik and Rittweger, Jörn and Rawer, Rainer and Zange, Jochen (2017) Vibration-related extrusion of capillary blood from the calf musculature depends upon directions of vibration of the leg and of the gravity vector. European Journal of Applied Physiology, 117 (6), pp. 1107-1117. Springer. DOI: 10.1007/s00421-017-3597-x ISSN 1439-6319

Full text not available from this repository.

Official URL: http://www.ncbi.nlm.nih.gov/pubmed/28374114

Abstract

PURPOSE: In this study, we investigated the effects of vibration of the whole lower leg on the content and the oxygenation of hemoglobin in the unloaded relaxed lateral gastrocnemius muscle. Vibration was applied orthogonal to and in parallel with leg axis to examine whether the extrusion of blood depends on an alignment of main vessel direction, axis of vibration and gravity. METHOD: The blood volume in the muscles was altered by horizontal and 30 degrees upright body posture. Fifteen male subjects were exposed to 4 sets of experiments with both vibration directions and both tilt angles applied in permutated order. The absence of voluntary muscular activity and the potential occurrence of compound action potentials by stretch reflexes were monitored using electromyography. Total hemoglobin and tissue saturation index were measured with near infrared spectroscopy. Changes of lower leg circumference were measured with strain gauge system placed around the calf. RESULT: Vibration caused decrease in tHb and increase in TSI indicating extrusion of predominantly venous blood from the muscle. In 30 degrees tilted position, muscles contained more blood at baseline and vibration ejected more blood from the muscle compared with horizontal posture (p < 0.01). At 30 degrees tilting deeper drop in tHb and steeper increase in TSI (p < 0.01) were observed when vibration was applied in parallel with the length axis of muscle. CONCLUSION: It is concluded that the vibration extrudes more blood in 30 degrees head up posture and the vibration applied in parallel with the length axis of the muscle is more effective than orthogonal vibration.

Item URL in elib:https://elib.dlr.de/112334/
Document Type:Article
Title:Vibration-related extrusion of capillary blood from the calf musculature depends upon directions of vibration of the leg and of the gravity vector
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Cakar, Halil IbrahimDLR-ME, Fatih University Istanbul, Turkey, hicakar (at) gmail.comUNSPECIFIED
Dogan, SerfirazDLR-ME, University of Koblenz, Rhein-Ahr-Campus Remagen, ,serfirazdogan1 (at) gmx.deUNSPECIFIED
Kara, SadikFatih University Istanbul, Turkeyhttps://orcid.org/0000-0001-6063-6455
Rittweger, JörnJoern.Rittweger (at) dlr.dehttps://orcid.org/0000-0002-2223-8963
Rawer, RainerNovotec Medical GmbH, PforzheimUNSPECIFIED
Zange, JochenJochen.Zange (at) dlr.dehttps://orcid.org/0000-0003-1822-0952
Date:5 April 2017
Journal or Publication Title:European Journal of Applied Physiology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:117
DOI :10.1007/s00421-017-3597-x
Page Range:pp. 1107-1117
Publisher:Springer
ISSN:1439-6319
Status:Published
Keywords:Microcirculation; Near infrared spectroscopy; Tonic vibration reflex; Whole-body vibration
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 Artificial Gravity
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Space Physiology
Deposited By: Zange, Dr.rer.nat. Jochen
Deposited On:18 May 2017 10:39
Last Modified:06 Sep 2019 15:25

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