Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/1252
Appears in Collections:Faculty of Health Sciences and Sport Journal Articles
Peer Review Status: Refereed
Title: Correlation of average muscle fiber conduction velocity measured during cycling exercise with myosin heavy chain composition, lactate threshold, and VO2max
Authors: Farina, Dario
Ferguson, Richard A
Macaluso, Andrea
De, Vito Giuseppe
Contact Email: giuseppe.devito@stir.ac.uk
Keywords: Dynamic exercise
Surface EMG
Electrode arrays
Muscle fiber types
Issue Date: Aug-2007
Publisher: Elsevier / International Society of Electrophysiology and Kinesiology
Citation: Farina D, Ferguson RA, Macaluso A & De Vito G (2007) Correlation of average muscle fiber conduction velocity measured during cycling exercise with myosin heavy chain composition, lactate threshold, and VO2max, Journal of Electromyography and Kinesiology, 17 (4), pp. 393-400.
Abstract: The aim of the study was to investigate the correlation between myosin heavy chain (MHC) composition, lactate threshold (LT), maximal oxygen uptake VO2max, and average muscle fiber conduction velocity (MFCV) measured from surface electromyographic (EMG) signals during cycling exercise. Ten healthy male subjects participated in the study. MHC isoforms were identified from a sample of the vastus lateralis muscle and characterized as type I, IIA, and IIX. At least three days after a measure of LT and VO2max, the subjects performed a 2-min cycling exercise at 90 revolutions per minute and power output corresponding to LT, during which surface EMG signals were recorded from the vastus lateralis muscle with an adhesive electrode array. MFCV and instantaneous mean power spectral frequency of the surface EMG were estimated at the maximal instantaneous knee angular speed. Output power corresponding to LT and VO2max were correlated with percentage of MHC I (R2 = 0.77; and 0.42, respectively; P < 0.05). MFCV was positively correlated with percentage of MHC I, power corresponding to LT and to VO2max (R2 = 0.84; 0.74; 0.53, respectively; P < 0.05). Instantaneous mean power spectral frequency was not correlated with any of these variables or with MFCV, thus questioning the use of surface EMG spectral analysis for indirect estimation of MFCV in dynamic contractions.
Type: Journal Article
URI: http://hdl.handle.net/1893/1252
DOI Link: http://dx.doi.org/10.1016/j.jelekin.2006.03.003
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author; you can only request a copy if you wish to use this work for your own research or private study.
Affiliation: Aalborg University
University of Strathclyde
University of Strathclyde
Sport

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