Preliminary StudyHormonal and Metabolic Responses to Whole Body Vibration in Healthy AdultsFricke, Oliver MD*; Semler, Oliver MD*; Land, Christof MD*; Beccard, Ralf PhD*; Thoma, Philipp MD†; Schoenau, Eckhard MD* Author Information From the *Children's Hospital, University of Cologne, Cologne, Germany; and †Department of Internal Medicine II, University of Cologne, Cologne, Germany. Supported by Novo Nordisk. Reprints: Oliver Fricke, MD, Children's Hospital, University of Cologne, Kerpener Street 62, D-50924 Cologne, Germany. E-mail: [email protected]. The Endocrinologist 19(1):p 24-30, January 2009. | DOI: 10.1097/TEN.0b013e3181959050 Buy Metrics Abstract The purpose of this study is to investigate the effect of side-alternating whole body vibration (WBV) on hormone secretion and metabolism in healthy adults. Twenty voluntary participants (10 women) were recruited for the experiment to measure hormonal and metabolic responses to WBV (oscillation frequency, 26 Hz; amplitude, 1 mm; acceleration, 2.7 g) in blood samples drawn before, during and after WBV. WBV increased growth hormone serum levels in men and decreased them in women. Adrenocorticotropic hormone and cortisol decreased. Thyroid stimulating hormone, free T3, and free T4 decreased after WBV. Prolactin decreased in men. The secretion of gonadal hormones was not significantly influenced. Lactate levels increased during WBV and glucose levels decreased. Our results suggest that hormonal and metabolic responses to WBV do not simply reflect intensive exercising. The responses were characterized by a pattern of hormonal secretion typical for responses to mechanical vibrations of the whole body. © 2009 Lippincott Williams & Wilkins, Inc.