Universität zu Köln

Cakar, Halil Ibrahim, Dogan, Serfiraz, Kara, Sadik, Rittweger, Joern, 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. Eur. J. Appl. Physiol., 117 (6). S. 1107 - 1118. NEW YORK: SPRINGER. ISSN 1439-6327

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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 Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Cakar, Halil Ibrahim UNSPECIFIED UNSPECIFIED UNSPECIFIED Dogan, Serfiraz UNSPECIFIED UNSPECIFIED UNSPECIFIED Kara, Sadik UNSPECIFIED UNSPECIFIED UNSPECIFIED Rittweger, Joern UNSPECIFIED UNSPECIFIED UNSPECIFIED Rawer, Rainer UNSPECIFIED UNSPECIFIED UNSPECIFIED Zange, Jochen UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-230312
DOI:	10.1007/s00421-017-3597-x
Journal or Publication Title:	Eur. J. Appl. Physiol.
Volume:	117
Number:	6
Page Range:	S. 1107 - 1118
Date:	2017
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; MUSCLE STRENGTH; BACK-PAIN; EXERCISE; FLOW Multiple languages Physiology; Sport Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/23031