Institute of Health and Sport Sciences, University of Tsukuba, Tsukuba, Japan.
Department of Physical Education and Sport, Instituto Superior de Educación Física, Universidad de la República (UdelaR-ISEF), Montevideo, Uruguay.
Percept Mot Skills. 2024 Oct;131(5):1814-1833. doi: 10.1177/00315125241274215. Epub 2024 Sep 19.
We aimed to investigate how a ball regulation change, implemented in U15 girls' handball games, now affects game performance and shooting plays. Over 14 matches (28 observations), we included all the attacks ( = 813) and shooting plays ( = 589) with the conventional ball and all the attacks ( = 821) and shooting plays ( = 618) with the new ball performed by both teams. We used notational analysis to compare the game performance and shooting plays in these two conditions. Our main results were as follows: (i) the attack efficacy was higher with the new ball (41.9%) than with the conventional ball (36.1%); and (ii) the prevalence of the three-line defensive system was higher with the new ball (10.5%) than with the conventional ball (2.7%). It can be inferred that the new ball enabled backcourt players to execute more powerful middle- and long-range shots, leading to their adoption of deeper defensive tactics that were effective in halting advancing backcourt players. Moreover, implementing new ball regulations resulted in a significantly higher frequency of shots targeted at the upper third of the goal frame (44.4%) compared to those observed with the conventional ball (35.8%). This implies that the introduction of the new ball enhanced precision control over shot placements, resulting in an increased player preference for targeting the upper course. Lastly, goalkeepers' saving rates decreased under the new ball, highlighting the need for technical and tactical coaching, tailored to goalkeepers. In summary, implementing the new ball regulations had a positive impact on Japanese U15 girls' handball performance.
我们旨在研究球的规则改变如何影响 U15 女子手球比赛中的表现和射门。在 14 场比赛（28 次观察）中，我们包括了传统球的所有进攻（=813）和射门（=589）以及两队使用新球的所有进攻（=821）和射门（=618）。我们使用记录分析法比较了这两种情况下的比赛表现和射门。我们的主要结果如下：（i）新球的进攻效率（41.9%）高于传统球（36.1%）；（ii）新球的三线防守系统的出现率（10.5%）高于传统球（2.7%）。可以推断，新球使后场球员能够执行更强大的中远程射门，导致他们采用更深入的防守策略，有效地阻止了后场球员的进攻。此外，实施新球规则导致射门更频繁地瞄准球门框架的上三分之一（44.4%），而传统球的这一比例为 35.8%。这意味着新球增强了对射门位置的精确控制，增加了球员对瞄准上区的偏好。最后，新球守门员的扑救率下降，这凸显了需要针对守门员进行技术和战术指导。总之，实施新球规则对日本 U15 女子手球表现产生了积极影响。
