Zange, Jochen and Haller, Timo and Müller, Klaus and Liphardt, Anna-Maria and Mester, Joachim (2009) Energy metabolism in human calf muscle performing isometric plantar flexion superimposed by 20-Hz vibration. European Journal of Applied Physiology, 105 (2), pp. 265-270. Springer Verlag.
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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 31P 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.
|Title:||Energy metabolism in human calf muscle performing isometric plantar flexion superimposed by 20-Hz vibration|
|Journal or Publication Title:||European Journal of Applied Physiology|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 265-270|
|Keywords:||Muscle physiology, Vibration training, Energy Metabolism, Magnetic resonance spectroscopy|
|HGF - Research field:||Aeronautics, Space and Transport (old)|
|HGF - Program:||Space (old)|
|HGF - Program Themes:||W FR - Forschung unter Weltraumbedingungen (old)|
|DLR - Research area:||Space|
|DLR - Program:||W FR - Forschung unter Weltraumbedingungen|
|DLR - Research theme (Project):||W - Vorhaben Beschleunigungsinduzierte Effekte (old)|
|Institutes and Institutions:||Institute of Aerospace Medicine > Space Physiology|
|Deposited By:||Dr.rer.nat. Jochen Zange|
|Deposited On:||13 Jan 2009|
|Last Modified:||07 Feb 2013 20:11|
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