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Stimulus Level during Endurance Training: Effects on Lactate Kinetics in Untrained Men

BACKGROUND/OBJECTIVE: Not only but particularly due to their time efficiency, High-Intensity Interval Training (HIIT) is becoming increasingly popular in fitness-oriented endurance sports. The purpose of this study was to determine the effect of a HIIT running program versus a Moderate Intensity Con...

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Autores principales: Tuttor, Michael, von Stengel, Simon, Hettchen, Michael, Kemmler, Wolfgang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6304585/
https://www.ncbi.nlm.nih.gov/pubmed/30631775
http://dx.doi.org/10.1155/2018/3158949
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author Tuttor, Michael
von Stengel, Simon
Hettchen, Michael
Kemmler, Wolfgang
author_facet Tuttor, Michael
von Stengel, Simon
Hettchen, Michael
Kemmler, Wolfgang
author_sort Tuttor, Michael
collection PubMed
description BACKGROUND/OBJECTIVE: Not only but particularly due to their time efficiency, High-Intensity Interval Training (HIIT) is becoming increasingly popular in fitness-oriented endurance sports. The purpose of this study was to determine the effect of a HIIT running program versus a Moderate Intensity Continuous Exercise (MICE) training running program (16 weeks each) on lactate kinetics in untrained males. METHODS: 65 healthy but untrained males (30-50 years, BMI: 27.2 ± 3.7kg/m(2)) were randomly assigned to either an HIIT (n=33) or a waiting-control/MICE group (n=32). HIIT consisted of intervals and intense continuous running bouts at or above the individual anaerobic threshold (IANS, 95-110% of IANS-HR), while MICE focused on continuous running at 70-82.5% IANS-HR. Both programs were adjusted for “total workload”. Study endpoints were time to IANS and time from IANS till “time to exhaustion” (TTE) as assessed by stepwise treadmill test. RESULTS: In both exercise groups time to reach IANS (MICE: 320 ± 160 s versus HIIT: 198 ± 118 s) increased significantly (p<.001), with the groups differing significantly (p<.001). Time from IANS until TTE was prolonged significantly among the HIIT group (27 ± 66s, p=.030), while among the MICE group a significant reduction of time from IANS until TTE (59 ± 109s; p=.017) was determined. Between-group difference is significant (p=.003) for this parameter. In both groups TTE increased significantly (HIIT: 27.2 ± 17.7% versus MICE: 29.0 ± 19.4%, both p<.001) at a similar level (p=.279). CONCLUSION: HIIT and MICE protocols, when adjusted for total workload, similarly increased running performance in untrained male subjects; however, the underlying mechanisms differ fundamentally. Due to its effects on aerobic and anaerobic performance improvement, HIIT can be recommended for untrained individuals as a time-efficient alternative or complementary training method to MICE. However, our protocol did not confirm the general superiority of HIIT versus MICE on the key endurance parameter “time to exhaustion” that has been reported by other comparative exercise studies.
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spelling pubmed-63045852019-01-10 Stimulus Level during Endurance Training: Effects on Lactate Kinetics in Untrained Men Tuttor, Michael von Stengel, Simon Hettchen, Michael Kemmler, Wolfgang J Sports Med (Hindawi Publ Corp) Clinical Study BACKGROUND/OBJECTIVE: Not only but particularly due to their time efficiency, High-Intensity Interval Training (HIIT) is becoming increasingly popular in fitness-oriented endurance sports. The purpose of this study was to determine the effect of a HIIT running program versus a Moderate Intensity Continuous Exercise (MICE) training running program (16 weeks each) on lactate kinetics in untrained males. METHODS: 65 healthy but untrained males (30-50 years, BMI: 27.2 ± 3.7kg/m(2)) were randomly assigned to either an HIIT (n=33) or a waiting-control/MICE group (n=32). HIIT consisted of intervals and intense continuous running bouts at or above the individual anaerobic threshold (IANS, 95-110% of IANS-HR), while MICE focused on continuous running at 70-82.5% IANS-HR. Both programs were adjusted for “total workload”. Study endpoints were time to IANS and time from IANS till “time to exhaustion” (TTE) as assessed by stepwise treadmill test. RESULTS: In both exercise groups time to reach IANS (MICE: 320 ± 160 s versus HIIT: 198 ± 118 s) increased significantly (p<.001), with the groups differing significantly (p<.001). Time from IANS until TTE was prolonged significantly among the HIIT group (27 ± 66s, p=.030), while among the MICE group a significant reduction of time from IANS until TTE (59 ± 109s; p=.017) was determined. Between-group difference is significant (p=.003) for this parameter. In both groups TTE increased significantly (HIIT: 27.2 ± 17.7% versus MICE: 29.0 ± 19.4%, both p<.001) at a similar level (p=.279). CONCLUSION: HIIT and MICE protocols, when adjusted for total workload, similarly increased running performance in untrained male subjects; however, the underlying mechanisms differ fundamentally. Due to its effects on aerobic and anaerobic performance improvement, HIIT can be recommended for untrained individuals as a time-efficient alternative or complementary training method to MICE. However, our protocol did not confirm the general superiority of HIIT versus MICE on the key endurance parameter “time to exhaustion” that has been reported by other comparative exercise studies. Hindawi 2018-12-02 /pmc/articles/PMC6304585/ /pubmed/30631775 http://dx.doi.org/10.1155/2018/3158949 Text en Copyright © 2018 Michael Tuttor et al. https://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 Clinical Study
Tuttor, Michael
von Stengel, Simon
Hettchen, Michael
Kemmler, Wolfgang
Stimulus Level during Endurance Training: Effects on Lactate Kinetics in Untrained Men
title Stimulus Level during Endurance Training: Effects on Lactate Kinetics in Untrained Men
title_full Stimulus Level during Endurance Training: Effects on Lactate Kinetics in Untrained Men
title_fullStr Stimulus Level during Endurance Training: Effects on Lactate Kinetics in Untrained Men
title_full_unstemmed Stimulus Level during Endurance Training: Effects on Lactate Kinetics in Untrained Men
title_short Stimulus Level during Endurance Training: Effects on Lactate Kinetics in Untrained Men
title_sort stimulus level during endurance training: effects on lactate kinetics in untrained men
topic Clinical Study
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6304585/
https://www.ncbi.nlm.nih.gov/pubmed/30631775
http://dx.doi.org/10.1155/2018/3158949
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