A single session of submaximal grip strength training with or without high-definition anodal-TDCS produces no cross-education of maximal force

Razie J. Alibazi; Ashlyn K. Frazer; Jamie Tallent; Alan J. Pearce; Tibor  Hortobágyi; Dawson Kidgell

doi:10.20338/bjmb.v15i3.223

A single session of submaximal grip strength training with or without high-definition anodal-TDCS produces no cross-education of maximal force

Authors

Razie J. Alibazi Department of Physiotherapy, School of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health Science, Monash University, Melbourne, Australia
Ashlyn K. Frazer Department of Physiotherapy, School of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health Science, Monash University, Melbourne, Australia
Jamie Tallent Faculty of Sport, Health and Applied Sciences, St Mary’s University, Twickenham, England
Alan J. Pearce College of Science, Health and Engineering, La Trobe University, Melbourne, Australia
Tibor Hortobágyi Center for Human Movement Sciences, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
Dawson Kidgell Department of Physiotherapy, School of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health Science, Monash University, Melbourne, Australia - dawson.kidgell@monash.edu

DOI:

https://doi.org/10.20338/bjmb.v15i3.223

Keywords:

Cross-education, Transcranial direct current stimulation, Ipsilateral motor cortex, Short-interval intracortical inhibition, Strength training

Abstract

BACKGROUND: Previous studies suggest that cross-education of strength may be modulated by increased corticospinal excitability of the ipsilateral primary motor cortex (M1) due to cross-activation. However, no study has examined the influence of bilateral TDCS of both M1 and how it affects corticospinal excitability, cross-activation and cross-education of muscle strength.

METHOD: Twelve participants underwent three conditions in a randomized crossover design: (1) submaximal grip training and single-site unilateral-high definition-TDCS (2) submaximal grip training and bilateral anodal-high definition-TDCS, and (3) submaximal grip training and sham-high definition-TDCS. Submaximal gripping task involved a single-session of unilateral training which was squeezing the transducer at 70% of maximum voluntary isometric contraction (MVIC) grip force and performing four sets of 10 isometric contractions. Anodal-high definition-TDCS was applied for 15 min at 1.5 mA over right M1 or left and right M1s, and in a sham condition. Participants were pseudorandomized to receive either single-site or bilateral M1 stimulation with each session separated by one-week. Before and after each session, MVIC force of ipsilateral and contralateral gripping, ipsilateral stimulus-response curve, short-interval intracortical inhibition, cortical silent period, intracortical facilitation, long-interval intracortical inhibition, and cross-activation were measured.

RESULTS: MVIC of the trained arm decreased by 43% (P=0.04) after training. We observed no changes in MVIC of the untrained hand and in any of the TMS measures (all P>0.05).

CONCLUSION: A single session of submaximal grip training with or without anodal-high definition-TDCS produces no cross-education of maximal grip force nor does it affect the excitability of the ipsilateral M1.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

Downloads

PDF
HTML

Published

2021-09-01

How to Cite

Alibazi, R. J., Frazer, A. K., Tallent, J., Pearce, A. J., Hortobágyi, T. ., & Kidgell, D. (2021). A single session of submaximal grip strength training with or without high-definition anodal-TDCS produces no cross-education of maximal force. Brazilian Journal of Motor Behavior, 15(3), 216–236. https://doi.org/10.20338/bjmb.v15i3.223

Download Citation

Issue

Vol. 15 No. 3 (2021)

Section

Research Articles

License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Authors must declare that the work submitted is their own and that copyright has not been breached in seeking its publication. If the manuscript includes work previously published elsewhere, it is the author(s) responsibility to obtain permission to use it and to indicate that such permission has been granted.

Authors retain the copyright of their paper and grant the Brazilian Journal of Motor Behavior (BJMB) the right to first publish the work under a Creative Commons Attribution-NonCommercial-NoDerivatives license (CC BY-NC-ND). This license allows users to share the paper given the appropriate credit to the author and source and does not allow commercial uses and derivative materials to be produced.