000131837 001__ 131837
000131837 005__ 20241125101158.0
000131837 0247_ $$2doi$$a10.3390/app131810015
000131837 0248_ $$2sideral$$a137120
000131837 037__ $$aART-2023-137120
000131837 041__ $$aeng
000131837 100__ $$aBlagus, Rok
000131837 245__ $$aCOVID-19 and Changes in the Model of Physical Fitness and Body Composition of Young Tennis Players
000131837 260__ $$c2023
000131837 5060_ $$aAccess copy available to the general public$$fUnrestricted
000131837 5203_ $$aThis retrospective study aimed to estimate the differences between selected indicators of physical fitness and body composition in young tennis players during the COVID-19 pandemic (2020 and 2021) and their values as predicted using the pre-pandemic trend (2015–2019). Data were collected from selected boys (mean ± SD; 13.2 ± 1.7 years) and girls (13.1 ± 1.9 years) during annual tests. Data were analyzed with linear mixed-effects models for males and females, separately, to predict body composition and physical fitness test scores, adjusting for age and pre-pandemic trends in the data. Compared with expected values, body fat mass increased in boys (2020: 0.68; 0.44–0.92, 2021: 1.08; 0.72–1.43), whereas muscle mass decreased (2020: −0.22; −0.34–−0.10, 2021: −0.28; −0.46–−0.10) throughout the pandemic. Interestingly, boys’ age-adjusted squat jump test scores improved relative to their expected scores during COVID-19 (2020: 0.19; 0.00–0.38, 2021: 0.35; 0.06–0.63). No other differences between predicted and measured values were noted across the observation period. The results of this study suggest that the sustained reduction in sports activity caused by the pandemic may have negatively affected the body composition of athletes; however, this did not affect selected performance indicators.
000131837 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000131837 590__ $$a2.5$$b2023
000131837 592__ $$a0.508$$b2023
000131837 591__ $$aENGINEERING, MULTIDISCIPLINARY$$b44 / 181 = 0.243$$c2023$$dQ1$$eT1
000131837 591__ $$aPHYSICS, APPLIED$$b87 / 179 = 0.486$$c2023$$dQ2$$eT2
000131837 591__ $$aCHEMISTRY, MULTIDISCIPLINARY$$b115 / 231 = 0.498$$c2023$$dQ2$$eT2
000131837 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b258 / 439 = 0.588$$c2023$$dQ3$$eT2
000131837 593__ $$aEngineering (miscellaneous)$$c2023$$dQ2
000131837 593__ $$aFluid Flow and Transfer Processes$$c2023$$dQ2
000131837 593__ $$aMaterials Science (miscellaneous)$$c2023$$dQ2
000131837 593__ $$aInstrumentation$$c2023$$dQ2
000131837 593__ $$aProcess Chemistry and Technology$$c2023$$dQ3
000131837 593__ $$aComputer Science Applications$$c2023$$dQ3
000131837 594__ $$a5.3$$b2023
000131837 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000131837 700__ $$aHadzic, Vedran
000131837 700__ $$0(orcid)0000-0003-4789-9618$$aFernandez Garcia, Angel Ivan$$uUniversidad de Zaragoza
000131837 700__ $$aLeskosek, Bojan
000131837 700__ $$aNarang, Benjamin J.
000131837 700__ $$aFilipcic, Ales
000131837 7102_ $$11006$$2245$$aUniversidad de Zaragoza$$bDpto. Fisiatría y Enfermería$$cÁrea Educación Física y Depor.
000131837 773__ $$g13, 18 (2023), 10015 [11 pp.]$$pAppl. sci.$$tApplied Sciences (Switzerland)$$x2076-3417
000131837 8564_ $$s1969401$$uhttps://zaguan.unizar.es/record/131837/files/texto_completo.pdf$$yVersión publicada
000131837 8564_ $$s2705451$$uhttps://zaguan.unizar.es/record/131837/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000131837 909CO $$ooai:zaguan.unizar.es:131837$$particulos$$pdriver
000131837 951__ $$a2024-11-22-12:10:28
000131837 980__ $$aARTICLE