Questionable Utility of the Eccentric Utilization Ratio in Relation to the Performance of Volleyball Players

The difference between squat jump (SJ) and countermovement jump (CMJ), termed eccentric utilization ratio (EUR), is frequently suggested as an outcome that can be used in athletic training design. Unlike performance in SJ and CMJ, which is associated with sports performance, the association between...

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Autores principales:	Žiga Kozinc, Jernej Pleša, Nejc Šarabon
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	squat jump stretch–shortening cycle agility vertical jump 505 test Medicine R
Acceso en línea:	https://doaj.org/article/d3350f2f4e66498bac2ce41fefb41b21
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spelling	oai:doaj.org-article:d3350f2f4e66498bac2ce41fefb41b212021-11-25T17:47:59ZQuestionable Utility of the Eccentric Utilization Ratio in Relation to the Performance of Volleyball Players10.3390/ijerph1822117541660-46011661-7827https://doaj.org/article/d3350f2f4e66498bac2ce41fefb41b212021-11-01T00:00:00Zhttps://www.mdpi.com/1660-4601/18/22/11754https://doaj.org/toc/1661-7827https://doaj.org/toc/1660-4601The difference between squat jump (SJ) and countermovement jump (CMJ), termed eccentric utilization ratio (EUR), is frequently suggested as an outcome that can be used in athletic training design. Unlike performance in SJ and CMJ, which is associated with sports performance, the association between EUR and sports performance is almost unexplored. This study aimed to investigate whether EUR is associated with performance in approach jump, linear sprint and change of direction (CoD) tasks in volleyball players. Forty-five male volleyball players performed SJ, CMJ, 25 m linear sprint, approach jump and two CoD tasks (505 test and modified T-test). EUR was calculated based on jump height, peak power, peak force and average power. SJ and CMJ variables showed moderate to high correlation with approach jump performance (<i>r</i> = 0.42–0.70), small correlation with modified T-test (<i>r</i> = 0.33–0.40) and small to moderate correlation with sprint time (<i>r</i> = 0.35–0.49). EUR showed only small associations with performance variables (<i>r</i> = 0.31–0.34). In all linear regression models with performance outcomes as dependent variables, the CMJ height was always the only statistically significant predictor. Our results support the recent arguments that the EUR offers limited insight into the neuromuscular capabilities of athletes.Žiga KozincJernej PlešaNejc ŠarabonMDPI AGarticlesquat jumpstretch–shortening cycleagilityvertical jump505 testMedicineRENInternational Journal of Environmental Research and Public Health, Vol 18, Iss 11754, p 11754 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	squat jump stretch–shortening cycle agility vertical jump 505 test Medicine R
spellingShingle	squat jump stretch–shortening cycle agility vertical jump 505 test Medicine R Žiga Kozinc Jernej Pleša Nejc Šarabon Questionable Utility of the Eccentric Utilization Ratio in Relation to the Performance of Volleyball Players
description	The difference between squat jump (SJ) and countermovement jump (CMJ), termed eccentric utilization ratio (EUR), is frequently suggested as an outcome that can be used in athletic training design. Unlike performance in SJ and CMJ, which is associated with sports performance, the association between EUR and sports performance is almost unexplored. This study aimed to investigate whether EUR is associated with performance in approach jump, linear sprint and change of direction (CoD) tasks in volleyball players. Forty-five male volleyball players performed SJ, CMJ, 25 m linear sprint, approach jump and two CoD tasks (505 test and modified T-test). EUR was calculated based on jump height, peak power, peak force and average power. SJ and CMJ variables showed moderate to high correlation with approach jump performance (<i>r</i> = 0.42–0.70), small correlation with modified T-test (<i>r</i> = 0.33–0.40) and small to moderate correlation with sprint time (<i>r</i> = 0.35–0.49). EUR showed only small associations with performance variables (<i>r</i> = 0.31–0.34). In all linear regression models with performance outcomes as dependent variables, the CMJ height was always the only statistically significant predictor. Our results support the recent arguments that the EUR offers limited insight into the neuromuscular capabilities of athletes.
format	article
author	Žiga Kozinc Jernej Pleša Nejc Šarabon
author_facet	Žiga Kozinc Jernej Pleša Nejc Šarabon
author_sort	Žiga Kozinc
title	Questionable Utility of the Eccentric Utilization Ratio in Relation to the Performance of Volleyball Players
title_short	Questionable Utility of the Eccentric Utilization Ratio in Relation to the Performance of Volleyball Players
title_full	Questionable Utility of the Eccentric Utilization Ratio in Relation to the Performance of Volleyball Players
title_fullStr	Questionable Utility of the Eccentric Utilization Ratio in Relation to the Performance of Volleyball Players
title_full_unstemmed	Questionable Utility of the Eccentric Utilization Ratio in Relation to the Performance of Volleyball Players
title_sort	questionable utility of the eccentric utilization ratio in relation to the performance of volleyball players
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d3350f2f4e66498bac2ce41fefb41b21
work_keys_str_mv	AT zigakozinc questionableutilityoftheeccentricutilizationratioinrelationtotheperformanceofvolleyballplayers AT jernejplesa questionableutilityoftheeccentricutilizationratioinrelationtotheperformanceofvolleyballplayers AT nejcsarabon questionableutilityoftheeccentricutilizationratioinrelationtotheperformanceofvolleyballplayers
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Questionable Utility of the Eccentric Utilization Ratio in Relation to the Performance of Volleyball Players

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