Methodological limitations of EMG-based bio-mechanical motion analysis

Saved in:
Bibliographic Details
Title translated into German:Methodologische Einschränkungen der EMG-basierten biomechanischen Bewegungsanalyse
Author:Jöllenbeck, Thomas
Published in:Proceedings of the XVIII International Symposium on Biomechanics in Sports, June 25 - 30 2000, Hong Kong [18 International Symposium on Biomechanics in Sports (2000)]
Published:Konstanz: 2000, S. 769-772, Lit.
Research institution:Universität Konstanz; The Chinese University of Hong Kong
Format: Publications (Database SPOLIT)
Publication Type: Compilation article
Media type: Electronic resource (online) Print resource
Online Access:
Identification number:PU201110008844

Author's abstract

The purpose of the present study was to investigate the influence of different methods on the identification of the onset of EMG and force. Using the example of electromechanical delay (EMD), results show a rather distinct dependence of onset times of both EMG and force on the applied method and within the threshold values. However, no automatic method has been found for providing reliable and comparable results. For determination of time sensitive values such as EMD, the visual method seems to be the only advisable method regarding accuracy and reliability. This method provides the earliest onset times, lowest threshold levels and a muscle independent course of EMD related to initial muscle length. For other cases of motion analysis or motor research, with some provision for acceptable inaccuracies of about ±20-30ms, this study illustrates why the preferable method should use a moderate low-pass filter and low percentage thresholds. Verf.-Referat