| Energy metabolism in human calf muscle performing isometric plantar flexion superimposed by 20-Hz vibration. | |
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MedLine Citation:
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PMID: 18953563 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Vibration training is commonly expected to induce an active muscle contraction via a complex reflex mechanism. In calf muscles of 20 untrained subjects, the additional energy consumption in response to vibration superimposed on an isometric contraction was examined by (31)P magnetic resonance spectroscopy and by near infrared spectroscopy. Subjects performed 3 min of isometric plantar flexion exercise at 40% MVC under four conditions: with (VIB) and without (CON) superimposed 20 Hz vibration at +/-2 mm amplitude, both combined with or without arterial occlusion (AO). After contraction under all conditions, the decreases in oxygenated haemoglobin were not significantly different. After VIB + AO consumption of ATP was increased by 60% over CON + AO, visible by significant decreases in [PCr] and intracellular pH (P < 0.05). The additional energy consumption by vibration was not detectable under natural perfusion. Probably without AO the additional energy consumption by vibration was compensated by oxidative phosphorylation enabled by additional perfusion. |
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Authors:
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Jochen Zange; Timo Haller; Klaus Müller; Anna-Maria Liphardt; Joachim Mester |
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Publication Detail:
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Type: Journal Article Date: 2008-10-25 |
Journal Detail:
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Title: European journal of applied physiology Volume: 105 ISSN: 1439-6327 ISO Abbreviation: Eur. J. Appl. Physiol. Publication Date: 2009 Jan |
Date Detail:
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Created Date: 2009-01-09 Completed Date: 2009-03-19 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100954790 Medline TA: Eur J Appl Physiol Country: Germany |
Other Details:
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Languages: eng Pagination: 265-70 Citation Subset: IM |
Affiliation:
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Institute of Aerospace Medicine, German Aerospace Center, Deutsches Zentrum für Luft- und Raumfahrt (DLR e.V.), Linder Höhe, 51147 Cologne, Germany. Jochen.Zange@dlr.de |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adenosine Triphosphate
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metabolism Energy Metabolism / physiology* Humans Hydrogen-Ion Concentration Ischemia / metabolism Isometric Contraction / physiology* Leg / physiology* Magnetic Resonance Spectroscopy Mitochondria, Muscle / metabolism Muscle, Skeletal / metabolism* Oxygen Consumption / physiology Oxyhemoglobins / analysis, metabolism Phosphocreatine / analysis Phosphorylation / physiology Spectroscopy, Near-Infrared Vibration* Young Adult |
| Chemical | |
Reg. No./Substance:
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0/Oxyhemoglobins; 56-65-5/Adenosine Triphosphate; 67-07-2/Phosphocreatine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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