The aim of this study was to examine the effect of an eight-week plyometric training and resistance programme, on different motor abilities, kicking speeds, and individual techniques in competitive junior soccer players. A training programme was applied for eight weeks and was composed of countermovement jump, countermovement onto a box, sprints, and sprints with change of direction. The players were evaluated in three moments: before the start of the training programme, after the application of the training programme, and after four weeks of detraining. The applied tests were: countermovement jump, speed dribbling, 30-meter sprint, kicking speed, and a Yo-Yo recovery intermittent recovery test Level 2 (Yo-Yo IE2). The results showed statistically significant differences (p<0.05) in sprint performance, countermovement jump, Yo-yo IE 2, and speed dribbling. The maximum velocity of the ball did not present statistically significant differences (p > 0.05). In addition, these results indicate that general performance may not be sensitive to four weeks of detraining in the trained soccer players. These results demonstrate that the combination of soccer drills and specific power training with no additional training time in-season optimizes some general and soccer-specific performance.

中文翻译：

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季节性的8周体能训练计划后的训练期对竞技少年足球运动员爆炸技能的影响

这项研究的目的是研究为期八周的体育锻炼和阻力训练程序对初级足球运动员不同的运动能力，踢腿速度和个人技术的影响。训练程序应用了八个星期，包括反向运动跳跃，向箱子反向运动，冲刺和方向改变的冲刺。在三个时刻对球员进行了评估：训练计划开始之前，训练计划应用之后以及训练四个星期之后。应用的测试包括：反向移动跳跃，速度盘带，30米短跑，脚踢速度和悠悠球恢复间歇性恢复测试2级（Yo-Yo IE2）。结果显示，在短跑性能，反跳，Yo-yo IE 2方面，差异具有统计学意义（p <0.05）和运球速度。球的最大速度没有统计学上的显着差异（p> 0.05）。此外，这些结果表明，训练有素的足球运动员的整体表现可能对四个星期的训练不敏感。这些结果表明，将足球训练与特定的力量训练相结合，而无需在赛季中增加额外的训练时间，可以优化一些常规和特定于足球的表现。