Universität zu Köln

Zange, Jochen, Molitor, Sven, Illbruck, Agnes, Mueller, Klaus, Schoenau, Eckhard, Kohl-Bareis, Matthias and Rittweger, Joern (2014). In the unloaded lower leg, vibration extrudes venous blood out of the calf muscles probably by direct acceleration and without arterial vasodilation. Eur. J. Appl. Physiol., 114 (5). S. 1005 - 1013. NEW YORK: SPRINGER. ISSN 1439-6327

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Abstract

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. Twelve 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. Within 30 s of vibration SmO2 increased from 55 +/- A 1 to 66 +/- A 1 % (mean +/- A SE). Within 1.5 min afterwards SmO2 decreased to a steady state (62 +/- A 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. The 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 Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zange, Jochen UNSPECIFIED UNSPECIFIED UNSPECIFIED Molitor, Sven UNSPECIFIED UNSPECIFIED UNSPECIFIED Illbruck, Agnes UNSPECIFIED UNSPECIFIED UNSPECIFIED Mueller, Klaus UNSPECIFIED UNSPECIFIED UNSPECIFIED Schoenau, Eckhard UNSPECIFIED UNSPECIFIED UNSPECIFIED Kohl-Bareis, Matthias UNSPECIFIED UNSPECIFIED UNSPECIFIED Rittweger, Joern UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-439537
DOI:	10.1007/s00421-014-2834-9
Journal or Publication Title:	Eur. J. Appl. Physiol.
Volume:	114
Number:	5
Page Range:	S. 1005 - 1013
Date:	2014
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1439-6327
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language WHOLE-BODY VIBRATION; TISSUE OXYGENATION; SPINDLE ENDINGS; EXERCISE; RESPONSES; SPECTROSCOPY; FREQUENCY; VOLUME; FLOW; LOAD Multiple languages Physiology; Sport Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/43953