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@article{1883057,
author = {Bozděch, Michal and Agricola, Adrián and Křehký, Adam and Schlegel, Petr and Zháněl, Jiří},
article_number = {1},
doi = {http://dx.doi.org/10.5817/StS2022-1-2},
keywords = {birthdate; performance; sport; swimming; sex; adolescence},
language = {eng},
issn = {1802-7679},
journal = {Studia Sportiva},
title = {Relative age effect in elite swimmers in U14 Czech Championship},
url = {https://www-scopus-com.ezproxy.muni.cz/record/display.uri?eid=2-s2.0-85123712989&origin=resultslist&sort=plf-f&src=s&st1=Zhanel&st2=Jiri&nlo=1&nlr=20&nls=afprfnm-t&sid=f40fe9f777f8983fb62ec98ac418252a&sot=anl&sdt=aut&sl=33&s=AU-ID%28%22Zh%c3%a1n%c4%9bl%2},
volume = {16},
year = {2022}
}
TY - JOUR
ID - 1883057
AU - Bozděch, Michal - Agricola, Adrián - Křehký, Adam - Schlegel, Petr - Zháněl, Jiří
PY - 2022
TI - Relative age effect in elite swimmers in U14 Czech Championship
JF - Studia Sportiva
VL - 16
IS - 1
SP - 13-22
EP - 13-22
PB - Masaryk University Faculty of Sports Studies
SN - 18027679
KW - birthdate
KW - performance
KW - sport
KW - swimming
KW - sex
KW - adolescence
UR - https://www-scopus-com.ezproxy.muni.cz/record/display.uri?eid=2-s2.0-85123712989&origin=resultslist&sort=plf-f&src=s&st1=Zhanel&st2=Jiri&nlo=1&nlr=20&nls=afprfnm-t&sid=f40fe9f777f8983fb62ec98ac418252a&sot=anl&sdt=aut&sl=33&s=AU-ID%28%22Zh%c3%a1n%c4%9bl%2
N2 - PUrPoSEThe issue of the Relative Age Effect (RAE) has been studied in the theory of sports for more than 30 years. Most studies concentrate on team sports, while the area of some individual sports like swimming can be considered still underexplored. MEthoDS The aim of our study was to verify the RAE in young elite swimmers (n = 198) who participa-ted in Czech Republic U14 Championship (1) in male and female samples (2) according to swimming disciplines and distances (3) and performance (times in individual disciplines) between individual quartiles / semesters of birth. The analysis was performed with the use of adequate statistical (chi--square test, Kruskal-Wallis H test, Mann-Whitney U test) and effect size (effect size w index, eta-square test, effect size r index) tests. rESUltS The results showed a different intensity of RAE sex-differences (male: w = 0.033; female: w = 0.006). In the division by the swimming disciplines and swimming distances, statistically significant values with large effect size were found in males in 50 m freestyle, 200 m individual medley, 100 m butterfly and 200 m butterfly. However, this did not apply for girls. Analysis of differences in performance showed a significant difference between the dependent variables (sex, distance, discipline) by different independent variables of quartile / semester of birth with large effect size only in cases of male 100 m breaststroke and female 200 m individual medley. ConClUSIonSThe issue of RAE should be circulated among the coaches working with youth, athletes, sports organizations, but also parents of athletes in order to avoid the termination of actively spent time or drop-outs.
ER -
BOZDĚCH, Michal, Adrián AGRICOLA, Adam KŘEHKÝ, Petr SCHLEGEL and Jiří ZHÁNĚL. Relative age effect in elite swimmers in U14 Czech Championship. \textit{Studia Sportiva}. Masaryk University Faculty of Sports Studies, 2022, vol.~16, No~1, p.~13-22. ISSN~1802-7679. Available from: https://dx.doi.org/10.5817/StS2022-1-2.
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