The time-course of acute changes in corticospinal excitability, intra-cortical inhibition and facilitation following a single-session heavy strength training of the biceps brachii Latella, Christopher, Hendy, Ashlee M., Pearce, Alan J., VanderWesthuizen, Dan and Teo, Wei-Peng 2016, The time-course of acute changes in corticospinal excitability, intra-cortical inhibition and facilitation following a single-session heavy strength training of the biceps brachii, Frontiers in human neuroscience, vol. 10, Article number: 607, pp. 1-9, doi: 10.3389/fnhum.2016.00607. Attached Files Name Description MIMEType Size Downloads latella-thetimecourse-2016.pdf Published version application/pdf 1.42MB 98 Title The time-course of acute changes in corticospinal excitability, intra-cortical inhibition and facilitation following a single-session heavy strength training of the biceps brachii Author(s) Latella, Christopher Hendy, Ashlee M. orcid.org/0000-0002-9043-8385 Pearce, Alan J. VanderWesthuizen, Dan Teo, Wei-Peng orcid.org/0000-0003-3929-9778 Journal name Frontiers in human neuroscience Volume number 10 Season Article number: 607 Start page 1 End page 9 Total pages 9 Publisher Frontiers Media Place of publication Lausanne, Switzerland Publication date 2016-12-01 ISSN 1662-5161 Keyword(s) transcranial magnetic stimulation corticospinal excitability intra-cortical inhibition intra-cortical facilitation super-compensation strength training Summary Objective: The current understanding of acute neurophysiological responses to resistance training remains unclear. Therefore, we aimed to compare the time-course of acute corticospinal responses following a single-session heavy strength training (HST) of the biceps brachii (BB) muscle and provide quantifiable evidence based on the super-compensation model in an applied setting. Methods: Fourteen participants completed a counter-balanced, cross-over study that consisted of a single HST session (5 sets × 3 repetition maximum [RM]) of the BB and a control session (CON). Single- and paired-pulse transcranial magnetic stimulation (TMS) was used to measure changes in motor-evoked potential (MEP) amplitude, intra-cortical facilitation (ICF), short-interval intra-cortical inhibition (SICI) and long-interval intra-cortical inhibition (LICI). Additionally, maximal muscle compound wave (MMAX) and maximal voluntary isometric contraction (MVIC) of the BB were taken. All measures were taken at baseline, immediately post and at 10, 20, 30 min and 1, 2, 6, 24, 48 and 72 h post-training. Results: A significant reduction in MEP amplitude was observed immediately post training (P = 0.001), while MVIC (P < 0.001) and MMAX (P = 0.047) were reduced for up to 30 min post-training. An increase in MVIC (p < 0.001) and MMAX (p = 0.047) was observed at 6 h, while an increase in MEP amplitude (p = 0.014) was only observed at 48 and 72 h. No changes in SICI, ICF and LICI were observed. Conclusion: Our results suggest that: (1) acute changes in corticospinal measures returned to baseline in a shorter timeframe than the current super-compensation model (24-48 h) and (2) changes in corticospinal excitability post-HST may be modulated "downstream" of the primary motor cortex (M1). Language eng DOI 10.3389/fnhum.2016.00607 Field of Research 110602 Exercise Physiology Socio Economic Objective 970111 Expanding Knowledge in the Medical and Health Sciences HERDC Research category C1 Refereed article in a scholarly journal ERA Research output type C Journal article Copyright notice ©2016, The Authors Free to Read? Yes Use Rights Persistent URL http://hdl.handle.net/10536/DRO/DU:30090619 Document type: Journal Article Collections: Faculty of Health School of Exercise and Nutrition Sciences Open Access Collection Related Links Link Description Connect to published version Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au. Versions Version Filter Type Tue, 17 Jan 2017, 12:27:08 EST Tue, 17 Jan 2017, 12:30:04 EST Wed, 18 Jan 2017, 04:00:27 EST Wed, 18 Jan 2017, 07:30:01 EST Sat, 21 Jan 2017, 01:32:52 EST Sat, 28 Jan 2017, 05:07:52 EST Wed, 01 Feb 2017, 12:50:50 EST Wed, 01 Feb 2017, 12:54:57 EST Wed, 01 Feb 2017, 12:57:47 EST Fri, 07 Sep 2018, 12:20:15 EST Filtered Full Citation counts:   Cited 12 times in TR Web of Science Cited 10 times in Scopus Search Google Scholar Access Statistics: 358 Abstract Views, 99 File Downloads  -  Detailed Statistics Created: Tue, 17 Jan 2017, 12:30:04 EST

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