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01-07-2010 | Original Article

Resistance training induces supraspinal adaptations: evidence from movement-related cortical potentials

Authors: Michael J. Falvo, Erik J. Sirevaag, John W. Rohrbaugh, Gammon M. Earhart

Published in: European Journal of Applied Physiology | Issue 5/2010

Abstract

Early effects of a resistance training program include neural adaptations at multiple levels of the neuraxis, but direct evidence of central changes is lacking. Plasticity exhibited by multiple supraspinal centers following training may alter slow negative electroencephalographic activity, referred to as movement-related cortical potentials (MRCP). The purpose of this study was to determine whether MRCPs are altered in response to resistance training. Eleven healthy participants (24.6 ± 3.5 years) performed 3 weeks of explosive unilateral leg extensor resistance training. MRCP were assessed during 60 self-paced leg extensions against a constant nominal load before and after training. Resistance training was effective (P < 0.001) in increasing leg extensor peak force (+22%), rate of force production (+32%) as well as muscle activity (iEMG; +47%, P < 0.05). These changes were accompanied by several MRCP effects. Following training, MRCP amplitude was attenuated at several scalp sites overlying motor-related cortical areas (P < 0.05), and the onset of MRCP at the vertex was 28% (561 ms) earlier. In conclusion, the 3-week training protocol in the present study elicited significant strength gains which were accompanied by neural adaptations at the level of the cortex. We interpret our findings of attenuated cortical demand for submaximal voluntary movement as evidence for enhanced neural economy as a result of resistance training.

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Title: Resistance training induces supraspinal adaptations: evidence from movement-related cortical potentials
Authors: Michael J. Falvo
Erik J. Sirevaag
John W. Rohrbaugh
Gammon M. Earhart
Publication date: 01-07-2010
Publisher: Springer-Verlag
Published in: European Journal of Applied Physiology / Issue 5/2010
Print ISSN: 1439-6319
Electronic ISSN: 1439-6327
DOI: https://doi.org/10.1007/s00421-010-1432-8

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Resistance training induces supraspinal adaptations: evidence from movement-related cortical potentials

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