Elite and Sub-elite Youth Soccer Players Show no Difference in Vertical Jump Performance

Q3 Health Professions
Sport Mont Pub Date : 2023-02-01 DOI:10.26773/smj.230207
Maros Kalata, Matej Varjan, Mikulas Hank, L. Malá, Osman Imal, Jana Marketin
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引用次数: 0

Abstract

This study aimed to determine whether vertical jump performance differs among youth players with different performance levels. A total of 84 youth male soccer players from the U19 category were recruited. The players were divided into the elite (EG) and sub-elite (SEG) groups based on their performance level. The vertical jump (VJ) performance during countermovement jump with free arms (CMJFA) and drop jump (DJ) were measured using two force platforms Kistler B8611A at a sampling rate of 1000 Hz (KISTLER Instrumente AG, Switzerland). The following outcome variables were calculated in all participants: vertical jump height (VJH), vertical ground reaction force (VGRF), and force impulse (FI) in absolute and relative values. Data analysis showed no significant differences (p>0.05) with trivial to small effects in VJH for both jump types (CMJFA and DJ) between EG and SEG. FIrelative provides a good indication of VJH in comparison with the other kinematic variables selected in this study. The leg muscle mass (LMM) ratio normalised to body mass provides a better association with VJH than the other selected morphological variables in this study, although a small effect size was observed. VJH does not appear to be a distinguishing feature among soccer players in the first two performance levels in the U19 category. Therefore, the results may not be sensitive enough to differentiate the performance levels, especially when the difference is only in one performance level. Future research should consider using other parameters, such as the eccentric rate of force development or reactive strength index, as recommended in a previous study.
优秀与次优秀青少年足球运动员在垂直跳能力上无显著差异
本研究旨在探讨不同水平青少年球员的垂直起跳表现是否存在差异。总共招募了84名U19级别的青年男子足球运动员。根据选手的竞技水平分为精英组(EG)和亚精英组(SEG)。采用瑞士Kistler仪器公司(Kistler Instrumente AG, Switzerland)的两个力台,以1000 Hz的采样率测量了自由臂反动作跳(CMJFA)和落体跳(DJ)的垂直跳(VJ)性能。计算所有参与者的结果变量:垂直跳高(VJH)、垂直地面反作用力(VGRF)和力冲量(FI)的绝对值和相对值。数据分析显示,EG和SEG在两种跳跃类型(CMJFA和DJ)的VJH上没有显著差异(p>0.05),影响微不足道。与本研究中选择的其他运动学变量相比,FIrelative提供了一个很好的VJH指示。在本研究中,与其他选择的形态学变量相比,腿部肌肉质量(LMM)与身体质量归一化的比例与VJH的关联更好,尽管观察到的效应量很小。在U19级别的前两个级别的球员中,VJH似乎并不是一个显著特征。因此,结果可能不够敏感,无法区分性能级别,特别是当只有一个性能级别的差异时。未来的研究应考虑使用其他参数,如力发展的偏心率或反应强度指数,如在以前的研究中建议的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Sport Mont
Sport Mont Health Professions-Physical Therapy, Sports Therapy and Rehabilitation
CiteScore
1.30
自引率
0.00%
发文量
58
审稿时长
24 weeks
期刊介绍: SM covers all aspects of sports science and medicine; all clinical aspects of exercise, health, and sport; exercise physiology and biophysical investigation of sports performance; sport biomechanics; sports nutrition; rehabilitation, physiotherapy; sports psychology; sport pedagogy, sport history, sport philosophy, sport sociology, sport management; and all aspects of scientific support of the sports coaches from the natural, social and humanistic side.
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