Strength and jumping performance in youth athletes: do sport specialization and age categories affect strength asymmetry?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15510%2F25%3A73636450" target="_blank" >RIV/61989592:15510/25:73636450 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11510/25:10505981

Výsledek na webu

<a href="https://www.tandfonline.com/doi/full/10.1080/15438627.2025.2465544?scroll=top&needAccess=true#d1e355" target="_blank" >https://www.tandfonline.com/doi/full/10.1080/15438627.2025.2465544?scroll=top&needAccess=true#d1e355</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/15438627.2025.2465544" target="_blank" >10.1080/15438627.2025.2465544</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Strength and jumping performance in youth athletes: do sport specialization and age categories affect strength asymmetry?

Popis výsledku v původním jazyce

The aim of the study was to determine the influence of sports specialization and age on isokinetic strength, vertical jump performance and strength asymmetry in elite youth athletes. Methods: A total of 181 young male athletes were recruited and categorized according to sport specialization (soccer or athletics) and age categories (U15, U17 or U19). Isokinetic strength was measured as peak muscle torque (PT), normalized to body mass, for the knee extensors (PTKE) and knee flexors (PTKF) during concentric muscle contraction at three angular velocities (60°s−1. 180°s−1. 300°s−1). Vertical jump performance was measured during a countermovement jump with arms fixed (CMJ) and a squat jump (SJ). Results:Significantly higher values of bilateral asymmetry (BA) of PTKF for angular velocity 60°s−1 and 180°s−1 were found in the athletics group compared to the soccer group in the U17 category (14.40% to 16.02% vs 9.07% to 10.45%). Significantly higher values of BA for angular velocity 300°s−1 for both PTKE and PTKF were found in the U15 compared to U19 category. Significantly higher values of H:Q ratio at all angular velocity except for the non-dominant leg in the highest angular velocity in soccer compared to the athletes in the U17 category were found. Soccer players exhibited significantly higher values of PTKF compared to those in athletics and jump height in the U17 category. Conclusion: Soccer players displayed increased isokinetic strength and more balanced BA compared to the athletics group. Physiotherapists and strength coaches should focus on younger age groups, especially U15, due to the higher incidence of BA and lower relative strength regardless of specialization.

Název v anglickém jazyce

Strength and jumping performance in youth athletes: do sport specialization and age categories affect strength asymmetry?

Popis výsledku anglicky

The aim of the study was to determine the influence of sports specialization and age on isokinetic strength, vertical jump performance and strength asymmetry in elite youth athletes. Methods: A total of 181 young male athletes were recruited and categorized according to sport specialization (soccer or athletics) and age categories (U15, U17 or U19). Isokinetic strength was measured as peak muscle torque (PT), normalized to body mass, for the knee extensors (PTKE) and knee flexors (PTKF) during concentric muscle contraction at three angular velocities (60°s−1. 180°s−1. 300°s−1). Vertical jump performance was measured during a countermovement jump with arms fixed (CMJ) and a squat jump (SJ). Results:Significantly higher values of bilateral asymmetry (BA) of PTKF for angular velocity 60°s−1 and 180°s−1 were found in the athletics group compared to the soccer group in the U17 category (14.40% to 16.02% vs 9.07% to 10.45%). Significantly higher values of BA for angular velocity 300°s−1 for both PTKE and PTKF were found in the U15 compared to U19 category. Significantly higher values of H:Q ratio at all angular velocity except for the non-dominant leg in the highest angular velocity in soccer compared to the athletes in the U17 category were found. Soccer players exhibited significantly higher values of PTKF compared to those in athletics and jump height in the U17 category. Conclusion: Soccer players displayed increased isokinetic strength and more balanced BA compared to the athletics group. Physiotherapists and strength coaches should focus on younger age groups, especially U15, due to the higher incidence of BA and lower relative strength regardless of specialization.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

30306 - Sport and fitness sciences

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Research in Sports Medicine

ISSN

1543-8627

e-ISSN

1543-8635

Svazek periodika

33

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

18

Strana od-do

334-351

Kód UT WoS článku

001423946100001

EID výsledku v databázi Scopus

2-s2.0-105002267923