Strength and jumping performance in youth athletes: do sport specialization and age categories affect strength asymmetry?
The result's identifiers
Result code in 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>
Alternative codes found
RIV/00216208:11510/25:10505981
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Strength and jumping performance in youth athletes: do sport specialization and age categories affect strength asymmetry?
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
30306 - Sport and fitness sciences
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Research in Sports Medicine
ISSN
1543-8627
e-ISSN
1543-8635
Volume of the periodical
33
Issue of the periodical within the volume
3
Country of publishing house
GB - UNITED KINGDOM
Number of pages
18
Pages from-to
334-351
UT code for WoS article
001423946100001
EID of the result in the Scopus database
2-s2.0-105002267923