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The Impact of Functional Overreaching on Post-exercise Parasympathetic Reactivation in Runners

While post-exercise heart rate (HR) variability (HRV) has been shown to increase in response to training leading to improvements in performance, the effect of training leading to decrements in performance (i.e., overreaching) on this parameter has been largely ignored. This study evaluated the effec...

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Autores principales: Bellenger, Clint R., Thomson, Rebecca L., Davison, Kade, Robertson, Eileen Y., Buckley, Jonathan D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7820717/
https://www.ncbi.nlm.nih.gov/pubmed/33488402
http://dx.doi.org/10.3389/fphys.2020.614765
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author Bellenger, Clint R.
Thomson, Rebecca L.
Davison, Kade
Robertson, Eileen Y.
Buckley, Jonathan D.
author_facet Bellenger, Clint R.
Thomson, Rebecca L.
Davison, Kade
Robertson, Eileen Y.
Buckley, Jonathan D.
author_sort Bellenger, Clint R.
collection PubMed
description While post-exercise heart rate (HR) variability (HRV) has been shown to increase in response to training leading to improvements in performance, the effect of training leading to decrements in performance (i.e., overreaching) on this parameter has been largely ignored. This study evaluated the effect of heavy training leading to performance decrements on sub-maximal post-exercise HRV. Running performance [5 km treadmill time-trial (5TTT)], post-exercise HRV [root-mean-square difference of successive normal R-R intervals (RMSSD)] and measures of subjective training tolerance (Daily Analysis of Life Demands for Athletes “worse than normal” scores) were assessed in 11 male runners following 1 week of light training (LT), 2 weeks of heavy training (HT) and a 10 day taper (T). Post-exercise RMSSD was assessed following 5 min of running exercise at an individualised speed eliciting 85% of peak HR. Time to complete 5TTT likely increased following HT (ES = 0.14 ± 0.03; p < 0.001), and then almost certainly decreased following T (ES = −0.30 ± 0.07; p < 0.001). Subjective training tolerance worsened after HT (ES = −2.54 ± 0.62; p = 0.001) and improved after T (ES = 2.16 ± 0.64; p = 0.004). In comparison to LT, post-exercise RMSSD likely increased at HT (ES = 0.65 ± 0.55; p = 0.06), and likely decreased at T (ES = −0.69 ± 0.45; p = 0.02). A moderate within-subject correlation was found between 5TTT and post-exercise RMSSD (r = 0.47 ± 0.36; p = 0.03). Increased post-exercise RMSSD following HT demonstrated heightened post-exercise parasympathetic modulation in functionally overreached athletes. Heightened post-exercise RMSSD in this context appears paradoxical given this parameter also increases in response to improvements in performance. Thus, additional measures such as subjective training tolerance are required to interpret changes in post-exercise RMSSD.
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spelling pubmed-78207172021-01-23 The Impact of Functional Overreaching on Post-exercise Parasympathetic Reactivation in Runners Bellenger, Clint R. Thomson, Rebecca L. Davison, Kade Robertson, Eileen Y. Buckley, Jonathan D. Front Physiol Physiology While post-exercise heart rate (HR) variability (HRV) has been shown to increase in response to training leading to improvements in performance, the effect of training leading to decrements in performance (i.e., overreaching) on this parameter has been largely ignored. This study evaluated the effect of heavy training leading to performance decrements on sub-maximal post-exercise HRV. Running performance [5 km treadmill time-trial (5TTT)], post-exercise HRV [root-mean-square difference of successive normal R-R intervals (RMSSD)] and measures of subjective training tolerance (Daily Analysis of Life Demands for Athletes “worse than normal” scores) were assessed in 11 male runners following 1 week of light training (LT), 2 weeks of heavy training (HT) and a 10 day taper (T). Post-exercise RMSSD was assessed following 5 min of running exercise at an individualised speed eliciting 85% of peak HR. Time to complete 5TTT likely increased following HT (ES = 0.14 ± 0.03; p < 0.001), and then almost certainly decreased following T (ES = −0.30 ± 0.07; p < 0.001). Subjective training tolerance worsened after HT (ES = −2.54 ± 0.62; p = 0.001) and improved after T (ES = 2.16 ± 0.64; p = 0.004). In comparison to LT, post-exercise RMSSD likely increased at HT (ES = 0.65 ± 0.55; p = 0.06), and likely decreased at T (ES = −0.69 ± 0.45; p = 0.02). A moderate within-subject correlation was found between 5TTT and post-exercise RMSSD (r = 0.47 ± 0.36; p = 0.03). Increased post-exercise RMSSD following HT demonstrated heightened post-exercise parasympathetic modulation in functionally overreached athletes. Heightened post-exercise RMSSD in this context appears paradoxical given this parameter also increases in response to improvements in performance. Thus, additional measures such as subjective training tolerance are required to interpret changes in post-exercise RMSSD. Frontiers Media S.A. 2021-01-08 /pmc/articles/PMC7820717/ /pubmed/33488402 http://dx.doi.org/10.3389/fphys.2020.614765 Text en Copyright © 2021 Bellenger, Thomson, Davison, Robertson and Buckley. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Physiology
Bellenger, Clint R.
Thomson, Rebecca L.
Davison, Kade
Robertson, Eileen Y.
Buckley, Jonathan D.
The Impact of Functional Overreaching on Post-exercise Parasympathetic Reactivation in Runners
title The Impact of Functional Overreaching on Post-exercise Parasympathetic Reactivation in Runners
title_full The Impact of Functional Overreaching on Post-exercise Parasympathetic Reactivation in Runners
title_fullStr The Impact of Functional Overreaching on Post-exercise Parasympathetic Reactivation in Runners
title_full_unstemmed The Impact of Functional Overreaching on Post-exercise Parasympathetic Reactivation in Runners
title_short The Impact of Functional Overreaching on Post-exercise Parasympathetic Reactivation in Runners
title_sort impact of functional overreaching on post-exercise parasympathetic reactivation in runners
topic Physiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7820717/
https://www.ncbi.nlm.nih.gov/pubmed/33488402
http://dx.doi.org/10.3389/fphys.2020.614765
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