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Correlation of average muscle fiber conduction velocity measured during cycling exercise with myosin heavy chain composition, lactate threshold, and VO2max.
J Electromyogr Kinesiol. 2007 Aug; 17(4):393-400.JE

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.

Authors+Show Affiliations

Center for Sensory-Motor Interaction (SMI), Department of Health Science and Technology, Fredrik Bajers Vej 7 D-3, Aalborg University, DK-9220 Aalborg, Denmark. df@hst.aau.dkNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

16709460

Citation

Farina, Dario, et al. "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 : Official Journal of the International Society of Electrophysiological Kinesiology, vol. 17, no. 4, 2007, pp. 393-400.
Farina D, Ferguson RA, Macaluso A, et al. Correlation of average muscle fiber conduction velocity measured during cycling exercise with myosin heavy chain composition, lactate threshold, and VO2max. J Electromyogr Kinesiol. 2007;17(4):393-400.
Farina, D., Ferguson, R. A., 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 : Official Journal of the International Society of Electrophysiological Kinesiology, 17(4), 393-400.
Farina D, et al. Correlation of Average Muscle Fiber Conduction Velocity Measured During Cycling Exercise With Myosin Heavy Chain Composition, Lactate Threshold, and VO2max. J Electromyogr Kinesiol. 2007;17(4):393-400. PubMed PMID: 16709460.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Correlation of average muscle fiber conduction velocity measured during cycling exercise with myosin heavy chain composition, lactate threshold, and VO2max. AU - Farina,Dario, AU - Ferguson,Richard A, AU - Macaluso,Andrea, AU - De Vito,Giuseppe, Y1 - 2006/05/18/ PY - 2005/10/15/received PY - 2006/03/11/revised PY - 2006/03/13/accepted PY - 2006/5/20/pubmed PY - 2007/8/19/medline PY - 2006/5/20/entrez SP - 393 EP - 400 JF - Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology JO - J Electromyogr Kinesiol VL - 17 IS - 4 N2 - 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. SN - 1050-6411 UR - https://www.unboundmedicine.com/medline/citation/16709460/Correlation_of_average_muscle_fiber_conduction_velocity_measured_during_cycling_exercise_with_myosin_heavy_chain_composition_lactate_threshold_and_VO2max_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1050-6411(06)00041-1 DB - PRIME DP - Unbound Medicine ER -