Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Analysis and Modelling of Muscles Motion during Whole Body Vibration | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID 972353 9 pages doi 2010 972353 Research Article Analysis and Modelling of Muscles Motion during Whole Body Vibration M. Cesarelli 1 A. Fratini 1 P. Bifulco 1 A. La Gatta 2 M. Romano 1 and G. Pasquariello1 1 Department of Biomedical Electronic and Telecommunication Engineering University of Naples Federico II 80125 Naples Italy 2 Math4Tech Centre University of Ferrara Ferrara 44100 Ferrara Italy Correspondence should be addressed to M. Cesarelli cesarell@ Received 1 May 2009 Accepted 3 August 2009 Academic Editor Joao Manuel R. S. Tavares Copyright 2010 M. Cesarelli et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. The aim of the study is to characterize the local muscles motion in individuals undergoing whole body mechanical stimulation. In this study we aim also to evaluate how subject positioning modifies vibration dumping altering local mechanical stimulus. Vibrations were delivered to subjects by the use of a vibrating platform while stimulation frequency was increased linearly from 15 to 60 Hz. Two different subject postures were here analysed. Platform and muscles motion were monitored using tiny MEMS accelerometers a contra lateral analysis was also presented. Muscle motion analysis revealed typical displacement trajectories motion components were found not to be purely sinusoidal neither in phase to each other. Results also revealed a mechanical resonant-like behaviour at some muscles similar to a second-order system response. Resonance frequencies and dumping factors depended on subject and his positioning. Proper mechanical stimulation can maximize muscle spindle solicitation which may produce a more effective muscle activation. 1. Introduction Vibratory stimulations .