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Distribution of motor unit potential velocities in the biceps brachii muscle of sprinters and endurance athletes during prolonged dynamic exercises at low force levels.

Klaver-Król, EG, Henriquez, NR, Oosterloo, SJ, Klaver, P, Kuipers, H and Zwarts, MJ (2010) Distribution of motor unit potential velocities in the biceps brachii muscle of sprinters and endurance athletes during prolonged dynamic exercises at low force levels. J Electromyogr Kinesiol, 20 (6). pp. 1115-1124.

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Abstract

In surface electromyography (sEMG), the distribution of motor unit potential (MUP) velocities has been shown to reflect the proportion of faster and slower propagating MUPs. This study investigated whether the distribution of MUP velocities could distinguish between sprinters (n=11) and endurance athletes (n=12) in not-specifically trained muscle (biceps brachii) during prolonged dynamic exercises at low forces. sEMG was acquired during 4min' exercises: unloaded, 5%, 10% and 20% of maximal voluntary contraction (MVC). The features extracted from the sEMG were: the mean muscle conduction velocity - estimated using the inter-peak latency and cross-correlation methods, the within-subject skewness (expressing the proportions of faster and slower propagating MUPs) and the within-subject standard deviation of MUP velocities (SD-mup). Sprinters showed a greater proportion of faster propagating MUPs than endurance athletes. During fatigue, the SD-mup of sprinters broadened progressively, whereas that of endurance athletes did not. The findings suggest that sprinters conveyed a greater proportion of faster motor units than endurance athletes and that motor unit behavior during fatigue differed between groups. Thus, the distribution of MUP velocities enables distinction between a muscle of sprinters and endurance athletes during prolonged dynamic exercises at low forces.

Item Type: Article
Authors :
NameEmailORCID
Klaver-Król, EGUNSPECIFIEDUNSPECIFIED
Henriquez, NRUNSPECIFIEDUNSPECIFIED
Oosterloo, SJUNSPECIFIEDUNSPECIFIED
Klaver, Pp.klaver@surrey.ac.ukUNSPECIFIED
Kuipers, HUNSPECIFIEDUNSPECIFIED
Zwarts, MJUNSPECIFIEDUNSPECIFIED
Date : December 2010
Identification Number : https://doi.org/10.1016/j.jelekin.2010.05.007
Uncontrolled Keywords : Adolescent, Adult, Arm, Electromyography, Humans, Individuality, Male, Muscle Contraction, Muscle Fatigue, Muscle, Skeletal, Physical Endurance, Physical Fitness, Running
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 10:40
Last Modified : 17 May 2017 14:51
URI: http://epubs.surrey.ac.uk/id/eprint/828707

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