Isokinetic Strength, Bilateral and Unilateral Strength Differences: Variation by Age and Laterality in Elite Youth Football Players

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11510%2F21%3A10425392" target="_blank" >RIV/00216208:11510/21:10425392 - isvavai.cz</a>

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=74-xYUf0F9" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=74-xYUf0F9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4067/S0717-95022021000100260" target="_blank" >10.4067/S0717-95022021000100260</a>

Result language

angličtina

Original language name

Isokinetic Strength, Bilateral and Unilateral Strength Differences: Variation by Age and Laterality in Elite Youth Football Players

Original language description

The purpose of this study was to investigate the effect of age on peak torque (PT) relative strength measures of knee extensors (KE) and knee flexors (KF), bilateral strength ratio (Q:Q, H:H), and ipsilateral strength ratio (H:Q) in youth elite male football players.Elite male players (n = 70) from four age categories (U16: n = 20, U17: n = 20, U19: n = 15, U21: n = 15) performed isokinetic strength tests using a Cybex dynamometer. Results show a significant effect of age on PTKE (F3,142 = 4.54, p = 0.005, = 0.09) and PTKF (age: F3,142 = 3.07, p = 0.030, = 0.06). No significant effect of age on unilateral (F3,142 = 1.05, p = 0.375, = 0.02) or ipsilateral strength ratio (F3,142 = 2.63, p = 0.053, = 0.06) was found. Results revealed significant differences in PTKE for nondominant limbs between U16 and U21. Higher bilateral differences were detected for flexors (H:H = 7.94-11.47 %, Q:Q = 7.97-9.29 %) compared to extensors. Our study showed that 17-year-old players have levels of strength similar to U19 players. A higher bilateral difference of knee flexors than extensors was found, suggesting that more attention should be paid to knee flexors. No effect of laterality was found for strength and strength asymmetries. Future research should also focus on ipsilateral strength ratio in late stage of maturation.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

30306 - Sport and fitness sciences

Project

<a href="/en/project/GA19-12150S" target="_blank" >GA19-12150S: Morphological, physiological and injury-related predispositions of elite soccer players – A model for talent identification and long term development</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

International Journal of Morphology [online]

ISSN

0717-9502

e-ISSN

—

Volume of the periodical

39

Issue of the periodical within the volume

1

Country of publishing house

CL - CHILE

Number of pages

8

Pages from-to

260-267

UT code for WoS article

000609552900002

EID of the result in the Scopus database

2-s2.0-85099969753