Clinical Sports Medicine

Purpose: The aim of the present investigation was to compare the blood lactate concentration (BLC) vs. heart rate (HR) relationship of incremental treadmill (ITR) vs. prolonged field running (PFR) in order to provide a mathematical equation allowing to adjust HR-based intensity zones, derived from n...

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Autores principales:	Wilhelm A, 4, Herbsleb M, Dittmar C, Rüdrich P, Schürer A, Wüstenfeld J, 5, Kastner T, Wolfarth B
Formato:	article
Lenguaje:	DE EN
Publicado:	Dynamic Media Sales Verlag 2021
Materias:	Sports medicine RC1200-1245
Acceso en línea:	https://doaj.org/article/dc2d55b7394e40958b1cf15e74d2e7b2
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spelling	oai:doaj.org-article:dc2d55b7394e40958b1cf15e74d2e7b22021-11-16T19:01:40ZClinical Sports Medicine0344-59252510-5264doi:10.5960/dzsm.2020.467https://doaj.org/article/dc2d55b7394e40958b1cf15e74d2e7b22021-02-01T00:00:00Zhttps://www.germanjournalsportsmedicine.com/archiv/archive-2021/issue-1/blood-lactate-kinetics-during-incremental-treadmill-vs-prolonged-field-running/https://doaj.org/toc/0344-5925https://doaj.org/toc/2510-5264Purpose: The aim of the present investigation was to compare the blood lactate concentration (BLC) vs. heart rate (HR) relationship of incremental treadmill (ITR) vs. prolonged field running (PFR) in order to provide a mathematical equation allowing to adjust HR-based intensity zones, derived from non-steady state ITR-exercise, to ensure their transposition to -and application for prolonged field running.Methods: Sixteen junior elite cross-country (XC) skiers were examined in ITR and PFR, where subjects were instructed to complete four consecutive self-paced 2.500 m-runs in undulating terrain at different exercise intensities. BLC obtained from both settings were compared at given HR, obtained from each of the four loops during PFR.Results: A two-way 4 x 2 repeated measures analysis of variance (ANOVA) showed a statistically significant main effect of stage (p&lt; .001) and test protocol (p&lt; .001), as well as a significant interaction effect between these two factors (p&lt;.001). Post-hoc calculated paired-samples t-test showed significantly lower BLC from ITR compared to that obtained from PFR at any loop/HR level. Cohens d revealed large effect sizes (loop 1: -; loop 2: 1.110.23 vs. 1.640.38 mmol l-1, p&lt;.001, d=1.71; loop 3: 1.790.38 vs. 4.211.19, p&lt;.001, d=2.12; loop 4: 3.080.75 vs. 9.161.67, p&lt;.001, d=3.99). Conclusion: For BLC-levels ranging from 1.5-6 mmol l-1, coaches should subtract approx. 15 beats min-1 from the HR obtained during a lab test identical to that used in the present study in order to exercise at comparable BLC during prolonged training in the field.Key Words: Heart Rate, Training Zones, T-Test, Two-Way Measures Analysis of Variance (ANOVA)Wilhelm A4Herbsleb MDittmar CRüdrich PSchürer AWüstenfeld J5Kastner T5Wolfarth B45Dynamic Media Sales VerlagarticleSports medicineRC1200-1245DEENDeutsche Zeitschrift für Sportmedizin, Vol 72, Iss 1 (2021)
institution	DOAJ
collection	DOAJ
language	DE EN
topic	Sports medicine RC1200-1245
spellingShingle	Sports medicine RC1200-1245 Wilhelm A 4 Herbsleb M Dittmar C Rüdrich P Schürer A Wüstenfeld J 5 Kastner T 5 Wolfarth B 4 5 Clinical Sports Medicine
description	Purpose: The aim of the present investigation was to compare the blood lactate concentration (BLC) vs. heart rate (HR) relationship of incremental treadmill (ITR) vs. prolonged field running (PFR) in order to provide a mathematical equation allowing to adjust HR-based intensity zones, derived from non-steady state ITR-exercise, to ensure their transposition to -and application for prolonged field running.Methods: Sixteen junior elite cross-country (XC) skiers were examined in ITR and PFR, where subjects were instructed to complete four consecutive self-paced 2.500 m-runs in undulating terrain at different exercise intensities. BLC obtained from both settings were compared at given HR, obtained from each of the four loops during PFR.Results: A two-way 4 x 2 repeated measures analysis of variance (ANOVA) showed a statistically significant main effect of stage (p&lt; .001) and test protocol (p&lt; .001), as well as a significant interaction effect between these two factors (p&lt;.001). Post-hoc calculated paired-samples t-test showed significantly lower BLC from ITR compared to that obtained from PFR at any loop/HR level. Cohens d revealed large effect sizes (loop 1: -; loop 2: 1.110.23 vs. 1.640.38 mmol l-1, p&lt;.001, d=1.71; loop 3: 1.790.38 vs. 4.211.19, p&lt;.001, d=2.12; loop 4: 3.080.75 vs. 9.161.67, p&lt;.001, d=3.99). Conclusion: For BLC-levels ranging from 1.5-6 mmol l-1, coaches should subtract approx. 15 beats min-1 from the HR obtained during a lab test identical to that used in the present study in order to exercise at comparable BLC during prolonged training in the field.Key Words: Heart Rate, Training Zones, T-Test, Two-Way Measures Analysis of Variance (ANOVA)
format	article
author	Wilhelm A 4 Herbsleb M Dittmar C Rüdrich P Schürer A Wüstenfeld J 5 Kastner T 5 Wolfarth B 4 5
author_facet	Wilhelm A 4 Herbsleb M Dittmar C Rüdrich P Schürer A Wüstenfeld J 5 Kastner T 5 Wolfarth B 4 5
author_sort	Wilhelm A
title	Clinical Sports Medicine
title_short	Clinical Sports Medicine
title_full	Clinical Sports Medicine
title_fullStr	Clinical Sports Medicine
title_full_unstemmed	Clinical Sports Medicine
title_sort	clinical sports medicine
publisher	Dynamic Media Sales Verlag
publishDate	2021
url	https://doaj.org/article/dc2d55b7394e40958b1cf15e74d2e7b2
work_keys_str_mv	AT wilhelma clinicalsportsmedicine AT 4 clinicalsportsmedicine AT herbslebm clinicalsportsmedicine AT dittmarc clinicalsportsmedicine AT rudrichp clinicalsportsmedicine AT schurera clinicalsportsmedicine AT wustenfeldj clinicalsportsmedicine AT 5 clinicalsportsmedicine AT kastnert clinicalsportsmedicine AT 5 clinicalsportsmedicine AT wolfarthb clinicalsportsmedicine AT 4 clinicalsportsmedicine AT 5 clinicalsportsmedicine
_version_	1718426207808126976

Clinical Sports Medicine

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