PDF(Pubmed)
Abstract：
This study aimed to achieve two objectives: firstly, to analyze the relationships between aerobic fitness, as represented by the VIFT, and the heart rate and locomotor responses of youth male soccer players across various teams; and secondly, to compare players with lower and higher VIFT in terms of performance outcomes extracted during small-sided games (SSGs). A total of twenty-six youth male soccer players, aged 16.5 ± 0.32 years, with 3.4 ± 1.1 years of experience, voluntarily participated in the study. These players belonged to two regional-level tier 2 teams (trained/developmental). In the initial week of observation, the 30-15 Intermittent Fitness Test was implemented to measure the final velocity (VIFT) achieved by the players. Subsequently, the 5v5 format of play was conducted twice a week over two consecutive weeks, during which heart rate responses and locomotor demands were measured. The Pearson product-moment correlation test revealed a significant correlation between VIFT and the total distance covered during the 5v5 format (r = 0.471 [95% CI: 0.093; 0.721], p = 0.015). Conversely, small and non-significant correlations were identified between VIFT and mean heart rate (r = 0.280 [95% CI: - 0.126; 0.598]; p = 0.166), VIFT and peak heart rate (r = 0.237 [95% CI: - 0.170; 0.569]; p = 0.243), as well as VIFT and high-speed running (r = 0.254 [95% CI: - 0.153; 0.580]; p = 0.211). Players with higher VIFT demonstrated a significantly greater total distance, with a large effect size (+ 6.64%; p = 0.015; d = 1.033), compared to those with lower VIFT. Our findings suggest that improved performance in VIFT may lead to covering more distance in 5v5 matches. However, the lack of significant associations between VIFT and heart rate levels during SSGs suggests that they are not strongly correlated, possibly because VIFT is more closely linked to locomotor profile. As a practical implication, coaches may consider organizing players during SSGs based on their VIFT if the goal is to standardize locomotor demands.
摘要：
本研究旨在实现两个目标:首先,为了分析有氧健身之间的关系，以VIFT为代表，以及各队青年男性足球运动员的心率和运动反应；其次，比较VIFT较低和较高的玩家在小面游戏（SSG）中提取的性能结果。共有二十六名青年男子足球运动员,年龄16.5±0.32岁，具有3.4±1.1年的经验，自愿参加研究。这些球员属于两个区域级别的2级球队（受过训练/发展）。在观察的最初一周，实施30-15间歇性体能测试以测量运动员达到的最终速度（VIFT）。随后，5v5格式的播放连续两周每周进行两次，在此期间测量心率反应和运动需求。Pearson乘积-矩相关性检验揭示了VIFT与5v5格式期间覆盖的总距离之间的显着相关性（r=0.471[95％CI：0.093;0.721]，p=0.015)。相反，VIFT和平均心率之间存在小的和非显著的相关性(r=0.280[95%CI:-0.126;0.598];p=0.166)，VIFT和峰值心率（r=0.237[95％CI：-0.170;0.569]；p=0.243），以及VIFT和高速运行(r=0.254[95%CI:-0.153;0.580];p=0.211)。具有较高VIFT的玩家表现出明显更大的总距离，具有较大的效果大小(+6.64%；p=0.015；d=1.033)，与VIFT较低的人相比。我们的发现表明，VIFT性能的提高可能会导致在5v5比赛中覆盖更多的距离。然而,在SSG期间，VIFT和心率水平之间缺乏显着关联，这表明它们之间没有很强的相关性，可能是因为VIFT与运动轮廓更紧密地联系在一起。作为一个实际的含义，如果目标是标准化运动需求，教练可以考虑在SSG期间根据他们的VIFT组织球员。
