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Applicability of Dmax Method on Heart Rate Variability to Estimate the Lactate Thresholds in Male Runners

INTRODUCTION: The purpose of this study was to evaluate the application of the Dmax method on heart rate variability (HRV) to estimate the lactate thresholds (LT), during a maximal incremental running test (MIRT). METHODS: Nineteen male runners performed two MIRTs, with the initial speed at 8 km·h(−...

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Autores principales: Nascimento, Eduardo Marcel Fernandes, Antunes, Diego, do Nascimento Salvador, Paulo Cesar, Borszcz, Fernando Klitzke, de Lucas, Ricardo Dantas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6770371/
https://www.ncbi.nlm.nih.gov/pubmed/31641671
http://dx.doi.org/10.1155/2019/2075371
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author Nascimento, Eduardo Marcel Fernandes
Antunes, Diego
do Nascimento Salvador, Paulo Cesar
Borszcz, Fernando Klitzke
de Lucas, Ricardo Dantas
author_facet Nascimento, Eduardo Marcel Fernandes
Antunes, Diego
do Nascimento Salvador, Paulo Cesar
Borszcz, Fernando Klitzke
de Lucas, Ricardo Dantas
author_sort Nascimento, Eduardo Marcel Fernandes
collection PubMed
description INTRODUCTION: The purpose of this study was to evaluate the application of the Dmax method on heart rate variability (HRV) to estimate the lactate thresholds (LT), during a maximal incremental running test (MIRT). METHODS: Nineteen male runners performed two MIRTs, with the initial speed at 8 km·h(−1) and increments of 1 km·h(−1) every 3 minutes, until exhaustion. Measures of HRV and blood lactate concentrations were obtained, and lactate (LT(1) and LT(2)) and HRV (HRVT(DMAX1) and HRVT(DMAX2)) thresholds were identified. ANOVA with Scheffe's post hoc test, effect sizes (d), the bias ± 95% limits of agreement (LoA), standard error of the estimate (SEE), Pearson's (r), and intraclass correlation coefficient (ICC) were calculated to assess validity. RESULTS: No significant differences were observed between HRVT(DMAX1) and LT(1) when expressed for speed (12.1 ± 1.4 km·h(−1) and 11.2 ± 2.1 km·h(−1); p=0.55; d = 0.45; r = 0.46; bias ± LoA = 0.8 ± 3.7 km·h(−1); SEE = 1.2 km·h(−1) (95% CI, 0.9–1.9)). Significant differences were observed between HRVT(DMAX2) and LT(2) when expressed for speed (12.0 ± 1.2 km·h(−1) and 14.1 ± 2.5 km·h(−1); p=0.00; d = 1.21; r = 0.48; bias ± LoA = −1.0 ± 1.8 km·h(−1); SEE = 1.1 km·h(−1) (95% CI, 0.8–1.6)), respectively. Reproducibility values were found for the LT(1) (ICC = 0.90; bias ± LoA = −0.7 ± 2.0 km·h(−1)), LT(2) (ICC = 0.97; bias ± LoA = −0.1 ± 1.1 km·h(−1)), HRVT(DMAX1) (ICC = 0.48; bias ± LoA = −0.2 ± 3.4 km·h(−1)), and HRVT(DMAX2) (ICC = 0.30; bias ± LoA = 0.3 ± 3.5 km·h(−1)). CONCLUSIONS: The Dmax method applied over a HRV dataset allowed the identification of LT(1) that is close to aerobic threshold, during a MIRT.
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spelling pubmed-67703712019-10-22 Applicability of Dmax Method on Heart Rate Variability to Estimate the Lactate Thresholds in Male Runners Nascimento, Eduardo Marcel Fernandes Antunes, Diego do Nascimento Salvador, Paulo Cesar Borszcz, Fernando Klitzke de Lucas, Ricardo Dantas J Sports Med (Hindawi Publ Corp) Research Article INTRODUCTION: The purpose of this study was to evaluate the application of the Dmax method on heart rate variability (HRV) to estimate the lactate thresholds (LT), during a maximal incremental running test (MIRT). METHODS: Nineteen male runners performed two MIRTs, with the initial speed at 8 km·h(−1) and increments of 1 km·h(−1) every 3 minutes, until exhaustion. Measures of HRV and blood lactate concentrations were obtained, and lactate (LT(1) and LT(2)) and HRV (HRVT(DMAX1) and HRVT(DMAX2)) thresholds were identified. ANOVA with Scheffe's post hoc test, effect sizes (d), the bias ± 95% limits of agreement (LoA), standard error of the estimate (SEE), Pearson's (r), and intraclass correlation coefficient (ICC) were calculated to assess validity. RESULTS: No significant differences were observed between HRVT(DMAX1) and LT(1) when expressed for speed (12.1 ± 1.4 km·h(−1) and 11.2 ± 2.1 km·h(−1); p=0.55; d = 0.45; r = 0.46; bias ± LoA = 0.8 ± 3.7 km·h(−1); SEE = 1.2 km·h(−1) (95% CI, 0.9–1.9)). Significant differences were observed between HRVT(DMAX2) and LT(2) when expressed for speed (12.0 ± 1.2 km·h(−1) and 14.1 ± 2.5 km·h(−1); p=0.00; d = 1.21; r = 0.48; bias ± LoA = −1.0 ± 1.8 km·h(−1); SEE = 1.1 km·h(−1) (95% CI, 0.8–1.6)), respectively. Reproducibility values were found for the LT(1) (ICC = 0.90; bias ± LoA = −0.7 ± 2.0 km·h(−1)), LT(2) (ICC = 0.97; bias ± LoA = −0.1 ± 1.1 km·h(−1)), HRVT(DMAX1) (ICC = 0.48; bias ± LoA = −0.2 ± 3.4 km·h(−1)), and HRVT(DMAX2) (ICC = 0.30; bias ± LoA = 0.3 ± 3.5 km·h(−1)). CONCLUSIONS: The Dmax method applied over a HRV dataset allowed the identification of LT(1) that is close to aerobic threshold, during a MIRT. Hindawi 2019-09-19 /pmc/articles/PMC6770371/ /pubmed/31641671 http://dx.doi.org/10.1155/2019/2075371 Text en Copyright © 2019 Eduardo Marcel Fernandes Nascimento et al. http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Nascimento, Eduardo Marcel Fernandes
Antunes, Diego
do Nascimento Salvador, Paulo Cesar
Borszcz, Fernando Klitzke
de Lucas, Ricardo Dantas
Applicability of Dmax Method on Heart Rate Variability to Estimate the Lactate Thresholds in Male Runners
title Applicability of Dmax Method on Heart Rate Variability to Estimate the Lactate Thresholds in Male Runners
title_full Applicability of Dmax Method on Heart Rate Variability to Estimate the Lactate Thresholds in Male Runners
title_fullStr Applicability of Dmax Method on Heart Rate Variability to Estimate the Lactate Thresholds in Male Runners
title_full_unstemmed Applicability of Dmax Method on Heart Rate Variability to Estimate the Lactate Thresholds in Male Runners
title_short Applicability of Dmax Method on Heart Rate Variability to Estimate the Lactate Thresholds in Male Runners
title_sort applicability of dmax method on heart rate variability to estimate the lactate thresholds in male runners
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6770371/
https://www.ncbi.nlm.nih.gov/pubmed/31641671
http://dx.doi.org/10.1155/2019/2075371
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