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Peripheral Alterations Affect the Loss in Force after a Treadmill Downhill Run

Downhill running has an important effect on performance in trail running competitions, but it is less studied than uphill running. The purpose of this study was to investigate the cardiorespiratory response during 15 min of downhill running (DR) and to evaluate the neuromuscular consequences in a gr...

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Autores principales: Giovanelli, Nicola, Floreani, Mirco, Vaccari, Filippo, Lazzer, Stefano
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8346098/
https://www.ncbi.nlm.nih.gov/pubmed/34360424
http://dx.doi.org/10.3390/ijerph18158135
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author Giovanelli, Nicola
Floreani, Mirco
Vaccari, Filippo
Lazzer, Stefano
author_facet Giovanelli, Nicola
Floreani, Mirco
Vaccari, Filippo
Lazzer, Stefano
author_sort Giovanelli, Nicola
collection PubMed
description Downhill running has an important effect on performance in trail running competitions, but it is less studied than uphill running. The purpose of this study was to investigate the cardiorespiratory response during 15 min of downhill running (DR) and to evaluate the neuromuscular consequences in a group of trail runners. Before and after a 15-min DR trial (slope: −25%) at ~60% of maximal oxygen consumption (V̇O(2)max), we evaluated maximal voluntary contraction torque (MVCt) and muscle contractility in a group of seventeen trail running athletes. Additionally, during the DR trial, we measured V̇O(2) and heart rate (HR). V̇O(2) and HR increased as a function of time, reaching +19.8 ± 15.9% (p < 0.001; ES: 0.49, medium) and +15.3 ± 9.9% (p < 0.001; ES: 0.55, large), respectively, in the last minute of DR. Post-exercise, the MVCt decreased (−22.2 ± 12.0%; p < 0.001; ES = 0.55, large) with respect to the pre-exercise value. All the parameters related to muscle contractility were impaired after DR: the torque evoked by a potentiated high frequency doublet decreased (−28.5 ± 12.7%; p < 0.001; ES: 0.61, large), as did the torque response from the single-pulse stimulation (St, −41.6 ± 13.6%; p < 0.001; ES: 0.70, large) and the M-wave (−11.8 ± 12.1%; p < 0.001; ES: 0.22, small). We found that after 15 min of DR, athletes had a decreased MVCt, which was ascribed mainly to peripheral rather than central alterations. Additionally, during low-intensity DR exercise, muscle fatigue and exercise-induced muscle damage may contribute to the development of O(2) and HR drift.
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spelling pubmed-83460982021-08-07 Peripheral Alterations Affect the Loss in Force after a Treadmill Downhill Run Giovanelli, Nicola Floreani, Mirco Vaccari, Filippo Lazzer, Stefano Int J Environ Res Public Health Article Downhill running has an important effect on performance in trail running competitions, but it is less studied than uphill running. The purpose of this study was to investigate the cardiorespiratory response during 15 min of downhill running (DR) and to evaluate the neuromuscular consequences in a group of trail runners. Before and after a 15-min DR trial (slope: −25%) at ~60% of maximal oxygen consumption (V̇O(2)max), we evaluated maximal voluntary contraction torque (MVCt) and muscle contractility in a group of seventeen trail running athletes. Additionally, during the DR trial, we measured V̇O(2) and heart rate (HR). V̇O(2) and HR increased as a function of time, reaching +19.8 ± 15.9% (p < 0.001; ES: 0.49, medium) and +15.3 ± 9.9% (p < 0.001; ES: 0.55, large), respectively, in the last minute of DR. Post-exercise, the MVCt decreased (−22.2 ± 12.0%; p < 0.001; ES = 0.55, large) with respect to the pre-exercise value. All the parameters related to muscle contractility were impaired after DR: the torque evoked by a potentiated high frequency doublet decreased (−28.5 ± 12.7%; p < 0.001; ES: 0.61, large), as did the torque response from the single-pulse stimulation (St, −41.6 ± 13.6%; p < 0.001; ES: 0.70, large) and the M-wave (−11.8 ± 12.1%; p < 0.001; ES: 0.22, small). We found that after 15 min of DR, athletes had a decreased MVCt, which was ascribed mainly to peripheral rather than central alterations. Additionally, during low-intensity DR exercise, muscle fatigue and exercise-induced muscle damage may contribute to the development of O(2) and HR drift. MDPI 2021-07-31 /pmc/articles/PMC8346098/ /pubmed/34360424 http://dx.doi.org/10.3390/ijerph18158135 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Giovanelli, Nicola
Floreani, Mirco
Vaccari, Filippo
Lazzer, Stefano
Peripheral Alterations Affect the Loss in Force after a Treadmill Downhill Run
title Peripheral Alterations Affect the Loss in Force after a Treadmill Downhill Run
title_full Peripheral Alterations Affect the Loss in Force after a Treadmill Downhill Run
title_fullStr Peripheral Alterations Affect the Loss in Force after a Treadmill Downhill Run
title_full_unstemmed Peripheral Alterations Affect the Loss in Force after a Treadmill Downhill Run
title_short Peripheral Alterations Affect the Loss in Force after a Treadmill Downhill Run
title_sort peripheral alterations affect the loss in force after a treadmill downhill run
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8346098/
https://www.ncbi.nlm.nih.gov/pubmed/34360424
http://dx.doi.org/10.3390/ijerph18158135
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