Effects of two different taper models after strength training on corticospinal excitability and muscle strength

Aim: The aim of this study was to investigate if there are (1) differences between the effects of two taper models on strength performance, (2) changes in corticospinal excitability and inhibition as the effect of 8 week of strength training, and (3) changes in corticospinal excitability and inhibit...

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Main Author: Virtanen, Minttu
Other Authors: Liikuntatieteellinen tiedekunta, Faculty of Sport and Health Sciences, Liikunta- ja terveystieteet, Sport and Health Sciences, Jyväskylän yliopisto, University of Jyväskylä
Format: Master's thesis
Language:eng
Published: 2018
Subjects:
Online Access: https://jyx.jyu.fi/handle/123456789/58114
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author Virtanen, Minttu
author2 Liikuntatieteellinen tiedekunta Faculty of Sport and Health Sciences Liikunta- ja terveystieteet Sport and Health Sciences Jyväskylän yliopisto University of Jyväskylä
author_facet Virtanen, Minttu Liikuntatieteellinen tiedekunta Faculty of Sport and Health Sciences Liikunta- ja terveystieteet Sport and Health Sciences Jyväskylän yliopisto University of Jyväskylä Virtanen, Minttu Liikuntatieteellinen tiedekunta Faculty of Sport and Health Sciences Liikunta- ja terveystieteet Sport and Health Sciences Jyväskylän yliopisto University of Jyväskylä
author_sort Virtanen, Minttu
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description Aim: The aim of this study was to investigate if there are (1) differences between the effects of two taper models on strength performance, (2) changes in corticospinal excitability and inhibition as the effect of 8 week of strength training, and (3) changes in corticospinal excitability and inhibition following two different taper models. Methods: Two groups (n = 6 + 5) of recreationally active men first performed 8-week hypertrophic and maximum strength training period, and after that Group 1 performed two weeks of step taper and Group 2 two weeks of linear taper. Squat 1 RM, leg press MVIC, knee extension MVIC and the measurements of corticospinal excitability with transcranial magnetic stimulation were performed six time during the study: week before strength training (conrtol), before strength training, after 5 and 8 weeks of strength training and after one and two weeks of taper. Results: Squat 1 RM improved for both groups through the study whereas MVIC in leg press and knee extension did not change as clearly. There were not statistical differences between groups in any strength results. MEParea with different stimulation intensities, MEPsum and the slope of the I/O-curve remained constant or slightly decreased during the 8-week of strength training period, whereas during the first week of taper they slightly increased for group 1 and slightly decreased for group 2, and during the second week of taper vice versa. AMT and the duration of silent periods did not change significantly during the study. Discussion & conclusion: The results of this study suggest that there are not differences between the effects of step taper and linear taper on strength performance. During the 8-week hypertrophic and maximum strength training period corticospinal excitability remained con-stant or slightly decreased. During taper step taper corticospinal excitability first slightly increased and then slightly decreased whereas during linear taper appeared to happen vice versa.
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Methods: Two groups (n = 6 + 5) of recreationally active men first performed 8-week hypertrophic and maximum strength training period, and after that Group 1 performed two weeks of step taper and Group 2 two weeks of linear taper. Squat 1 RM, leg press MVIC, knee extension MVIC and the measurements of corticospinal excitability with transcranial magnetic stimulation were performed six time during the study: week before strength training (conrtol), before strength training, after 5 and 8 weeks of strength training and after one and two weeks of taper. Results: Squat 1 RM improved for both groups through the study whereas MVIC in leg press and knee extension did not change as clearly. There were not statistical differences between groups in any strength results. 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spellingShingle Virtanen, Minttu Effects of two different taper models after strength training on corticospinal excitability and muscle strength strength training step taper linear taper corticospinal excitability motor evoked potential silent period Biomekaniikka Biomechanics 5012 lihasvoima transkraniaalinen magneettistimulaatio muscle strength transcranial magnetic stimulation
title Effects of two different taper models after strength training on corticospinal excitability and muscle strength
title_full Effects of two different taper models after strength training on corticospinal excitability and muscle strength
title_fullStr Effects of two different taper models after strength training on corticospinal excitability and muscle strength Effects of two different taper models after strength training on corticospinal excitability and muscle strength
title_full_unstemmed Effects of two different taper models after strength training on corticospinal excitability and muscle strength Effects of two different taper models after strength training on corticospinal excitability and muscle strength
title_short Effects of two different taper models after strength training on corticospinal excitability and muscle strength
title_sort effects of two different taper models after strength training on corticospinal excitability and muscle strength
title_txtP Effects of two different taper models after strength training on corticospinal excitability and muscle strength
topic strength training step taper linear taper corticospinal excitability motor evoked potential silent period Biomekaniikka Biomechanics 5012 lihasvoima transkraniaalinen magneettistimulaatio muscle strength transcranial magnetic stimulation
topic_facet 5012 Biomechanics Biomekaniikka corticospinal excitability lihasvoima linear taper motor evoked potential muscle strength silent period step taper strength training transcranial magnetic stimulation transkraniaalinen magneettistimulaatio
url https://jyx.jyu.fi/handle/123456789/58114 http://www.urn.fi/URN:NBN:fi:jyu-201805252784
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