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Contralateral effects of eccentric exercise and DOMS of the plantar flexors: evidence of central involvement

Purpose: Peripheral and central factors play important roles in the reduction of motor performance following damaging eccentric exercise and delayed onset muscle soreness (DOMS). Following this regime, contralateral limbs could also be affected; however, the factors involved remain inconclusive. The...

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Main Authors: Marathamuthu, Suresh, Selvanayagam, Victor Selvarajah, Yusof, Ashril
Format: Article
Published: Routledge Journals, Taylor & Francis Ltd 2022
Subjects:
RC1200 Sports Medicine
Online Access:http://eprints.um.edu.my/42479/
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spelling my.um.eprints.424792023-10-08T13:08:19Z http://eprints.um.edu.my/42479/ Contralateral effects of eccentric exercise and DOMS of the plantar flexors: evidence of central involvement Marathamuthu, Suresh Selvanayagam, Victor Selvarajah Yusof, Ashril RC1200 Sports Medicine Purpose: Peripheral and central factors play important roles in the reduction of motor performance following damaging eccentric exercise and delayed onset muscle soreness (DOMS). Following this regime, contralateral limbs could also be affected; however, the factors involved remain inconclusive. The purpose of this study was to distinguish the peripheral and central factors following eccentric contraction and DOMS of the plantar flexors in treated and contralateral homologous limbs.Methods: Ten males (BMI = 25.08 +/- 1.69kgm(-2); age = 28.70 +/- 4.24 years) were randomly assigned to experimental (DOM) or control (CON) groups. The DOM group performed a damaging eccentric exercise, while the CON group rested. Plasma creatine kinase (CK), pain rating scale (PRS), muscle stiffness, maximal voluntary contraction (MVC), and neural voluntary activation (VA) were measured before, after 10 min, and after 24, 48, and 72 hr on treated and contralateral limbs.Results: Following exercise, CK increased until after 48 hr, while PRS increased until after 72 hr compared to the CON group. Importantly, MVC was reduced at all time points, with the greatest reduction observed after 24 hr (-16%), while VA was affected until after 48 hr, with the greatest reduction at after 10 min (-7%). Interestingly, a ``cross-over effect'' was observed in contralateral limbs when PRS, MVC, and VA were negatively affected following the same pattern (time line) as treated limbs (-13% peak MVC reduction; -3.5% peak VA reduction).Conclusion: These findings suggest a substantial central contribution to the reduction in force immediately following eccentric exercise and to a lesser extent during the latter part of DOMS in both treated and contralateral limbs. Routledge Journals, Taylor & Francis Ltd 2022-04 Article PeerReviewed Marathamuthu, Suresh and Selvanayagam, Victor Selvarajah and Yusof, Ashril (2022) Contralateral effects of eccentric exercise and DOMS of the plantar flexors: evidence of central involvement. Research Quarterly For Exercise And Sport, 93 (2). pp. 240-249. ISSN ISSN 0270-1367, DOI https://doi.org/10.1080/02701367.2020.1819526 <https://doi.org/10.1080/02701367.2020.1819526>. 10.1080/02701367.2020.1819526
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic RC1200 Sports Medicine
spellingShingle RC1200 Sports Medicine
Marathamuthu, Suresh
Selvanayagam, Victor Selvarajah
Yusof, Ashril
Contralateral effects of eccentric exercise and DOMS of the plantar flexors: evidence of central involvement
description Purpose: Peripheral and central factors play important roles in the reduction of motor performance following damaging eccentric exercise and delayed onset muscle soreness (DOMS). Following this regime, contralateral limbs could also be affected; however, the factors involved remain inconclusive. The purpose of this study was to distinguish the peripheral and central factors following eccentric contraction and DOMS of the plantar flexors in treated and contralateral homologous limbs.Methods: Ten males (BMI = 25.08 +/- 1.69kgm(-2); age = 28.70 +/- 4.24 years) were randomly assigned to experimental (DOM) or control (CON) groups. The DOM group performed a damaging eccentric exercise, while the CON group rested. Plasma creatine kinase (CK), pain rating scale (PRS), muscle stiffness, maximal voluntary contraction (MVC), and neural voluntary activation (VA) were measured before, after 10 min, and after 24, 48, and 72 hr on treated and contralateral limbs.Results: Following exercise, CK increased until after 48 hr, while PRS increased until after 72 hr compared to the CON group. Importantly, MVC was reduced at all time points, with the greatest reduction observed after 24 hr (-16%), while VA was affected until after 48 hr, with the greatest reduction at after 10 min (-7%). Interestingly, a ``cross-over effect'' was observed in contralateral limbs when PRS, MVC, and VA were negatively affected following the same pattern (time line) as treated limbs (-13% peak MVC reduction; -3.5% peak VA reduction).Conclusion: These findings suggest a substantial central contribution to the reduction in force immediately following eccentric exercise and to a lesser extent during the latter part of DOMS in both treated and contralateral limbs.
format Article
author Marathamuthu, Suresh
Selvanayagam, Victor Selvarajah
Yusof, Ashril
author_facet Marathamuthu, Suresh
Selvanayagam, Victor Selvarajah
Yusof, Ashril
author_sort Marathamuthu, Suresh
title Contralateral effects of eccentric exercise and DOMS of the plantar flexors: evidence of central involvement
title_short Contralateral effects of eccentric exercise and DOMS of the plantar flexors: evidence of central involvement
title_full Contralateral effects of eccentric exercise and DOMS of the plantar flexors: evidence of central involvement
title_fullStr Contralateral effects of eccentric exercise and DOMS of the plantar flexors: evidence of central involvement
title_full_unstemmed Contralateral effects of eccentric exercise and DOMS of the plantar flexors: evidence of central involvement
title_sort contralateral effects of eccentric exercise and doms of the plantar flexors: evidence of central involvement
publisher Routledge Journals, Taylor & Francis Ltd
publishDate 2022
url http://eprints.um.edu.my/42479/
_version_ 1781704649453076480
score 13.211869

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