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Changes in Muscle Power and Muscle Morphology with Different Volumes of Fast Eccentric Half-Squats

The aim of the study was to evaluate power performance and muscle morphology adaptations in response to 5 weeks of fast-eccentric squat training (FEST) performed twice per week, with three different training volumes. Twenty-five moderately trained females were assigned into three groups performing e...

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Autores principales: Zacharia, Evangelia, Spiliopoulou, Polyxeni, Methenitis, Spyridon, Stasinaki, Angeliki-Nikoletta, Zaras, Nikolaos, Papadopoulos, Constantinos, Papadimas, Giorgos, Karampatsos, Giorgos, Bogdanis, Gregory C., Terzis, Gerasimos
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6681343/
https://www.ncbi.nlm.nih.gov/pubmed/31284388
http://dx.doi.org/10.3390/sports7070164
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author Zacharia, Evangelia
Spiliopoulou, Polyxeni
Methenitis, Spyridon
Stasinaki, Angeliki-Nikoletta
Zaras, Nikolaos
Papadopoulos, Constantinos
Papadimas, Giorgos
Karampatsos, Giorgos
Bogdanis, Gregory C.
Terzis, Gerasimos
author_facet Zacharia, Evangelia
Spiliopoulou, Polyxeni
Methenitis, Spyridon
Stasinaki, Angeliki-Nikoletta
Zaras, Nikolaos
Papadopoulos, Constantinos
Papadimas, Giorgos
Karampatsos, Giorgos
Bogdanis, Gregory C.
Terzis, Gerasimos
author_sort Zacharia, Evangelia
collection PubMed
description The aim of the study was to evaluate power performance and muscle morphology adaptations in response to 5 weeks of fast-eccentric squat training (FEST) performed twice per week, with three different training volumes. Twenty-five moderately trained females were assigned into three groups performing eight repetitions of FEST of either four sets (4 × 8 group; N = 9), 6 sets (6 × 8 group; N = 8) or eight sets (8 × 8 group, N = 8). Before and after the intervention, countermovement jumping height (CMJh) and power (CMJp), half squat maximal strength (1-RM), quadriceps cross-sectional area (QCSA) and vastus lateralis (VL) architecture and fiber type composition were evaluated. Significant increases (p < 0.05) were found for all groups, with no differences among them in 1-RM (4 × 8: 14.8 ± 8.2%, 6 × 8: 13.1 ± 9.2% and 8 × 8: 21.6 ± 7.0%), CMJh (4 × 8: 12.5 ± 8.5%, 6 × 8: 11.3 ± 9.3% and 8 × 8: 7.0 ± 6.2%), CMJp (4 × 8: 9.1 ± 6.0%, 6 × 8: 7.1 ± 5.2% and 8 × 8: 5.0 ± 3.9%) and QCSA (4 × 8: 7.7 ± 4.7%, 6 × 8: 9.0 ± 6.8% and 8 × 8: 8.2 ± 6.5%). Muscle fiber type distribution remained unaltered after training in all groups. VL fascicle length increased and fascicle angle decreased only in 6 × 8 and 8 × 8 groups. In conclusion, four sets of eight fast-eccentric squats/week increase lower body power and strength performance and maintain type IIX muscle fibers after 5 weeks, at least in moderately trained females.
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spelling pubmed-66813432019-08-09 Changes in Muscle Power and Muscle Morphology with Different Volumes of Fast Eccentric Half-Squats Zacharia, Evangelia Spiliopoulou, Polyxeni Methenitis, Spyridon Stasinaki, Angeliki-Nikoletta Zaras, Nikolaos Papadopoulos, Constantinos Papadimas, Giorgos Karampatsos, Giorgos Bogdanis, Gregory C. Terzis, Gerasimos Sports (Basel) Article The aim of the study was to evaluate power performance and muscle morphology adaptations in response to 5 weeks of fast-eccentric squat training (FEST) performed twice per week, with three different training volumes. Twenty-five moderately trained females were assigned into three groups performing eight repetitions of FEST of either four sets (4 × 8 group; N = 9), 6 sets (6 × 8 group; N = 8) or eight sets (8 × 8 group, N = 8). Before and after the intervention, countermovement jumping height (CMJh) and power (CMJp), half squat maximal strength (1-RM), quadriceps cross-sectional area (QCSA) and vastus lateralis (VL) architecture and fiber type composition were evaluated. Significant increases (p < 0.05) were found for all groups, with no differences among them in 1-RM (4 × 8: 14.8 ± 8.2%, 6 × 8: 13.1 ± 9.2% and 8 × 8: 21.6 ± 7.0%), CMJh (4 × 8: 12.5 ± 8.5%, 6 × 8: 11.3 ± 9.3% and 8 × 8: 7.0 ± 6.2%), CMJp (4 × 8: 9.1 ± 6.0%, 6 × 8: 7.1 ± 5.2% and 8 × 8: 5.0 ± 3.9%) and QCSA (4 × 8: 7.7 ± 4.7%, 6 × 8: 9.0 ± 6.8% and 8 × 8: 8.2 ± 6.5%). Muscle fiber type distribution remained unaltered after training in all groups. VL fascicle length increased and fascicle angle decreased only in 6 × 8 and 8 × 8 groups. In conclusion, four sets of eight fast-eccentric squats/week increase lower body power and strength performance and maintain type IIX muscle fibers after 5 weeks, at least in moderately trained females. MDPI 2019-07-05 /pmc/articles/PMC6681343/ /pubmed/31284388 http://dx.doi.org/10.3390/sports7070164 Text en © 2019 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zacharia, Evangelia
Spiliopoulou, Polyxeni
Methenitis, Spyridon
Stasinaki, Angeliki-Nikoletta
Zaras, Nikolaos
Papadopoulos, Constantinos
Papadimas, Giorgos
Karampatsos, Giorgos
Bogdanis, Gregory C.
Terzis, Gerasimos
Changes in Muscle Power and Muscle Morphology with Different Volumes of Fast Eccentric Half-Squats
title Changes in Muscle Power and Muscle Morphology with Different Volumes of Fast Eccentric Half-Squats
title_full Changes in Muscle Power and Muscle Morphology with Different Volumes of Fast Eccentric Half-Squats
title_fullStr Changes in Muscle Power and Muscle Morphology with Different Volumes of Fast Eccentric Half-Squats
title_full_unstemmed Changes in Muscle Power and Muscle Morphology with Different Volumes of Fast Eccentric Half-Squats
title_short Changes in Muscle Power and Muscle Morphology with Different Volumes of Fast Eccentric Half-Squats
title_sort changes in muscle power and muscle morphology with different volumes of fast eccentric half-squats
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6681343/
https://www.ncbi.nlm.nih.gov/pubmed/31284388
http://dx.doi.org/10.3390/sports7070164
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