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Comparative Analysis of Load Profile between Small-Sided Games and Official Matches in Youth Soccer Players

机译：青少年足球运动员小比赛与正式比赛负荷分布的比较分析

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The purposes of the present study are: (a) to characterize the external (eTL) and internal load (iTL) of official matches and small-sided games (SSGs) in relation to their objective, (b) to compare demands between SSG, and (c) to analyze the SSG requirements in relation to official matches during a one-month competition period. Twenty under-18 national-level soccer players were recorded using WIMU TM inertial devices (RealTrack Systems, Almeria, Spain) during four official matches and 12 training sessions where four SSGs with different objectives were performed: (SSG1) keeping the ball; (SSG2) keeping the ball and progressing; (SSG3) keeping the ball, progressing and ending in mini-goals; and (SSG4) keeping the ball, progressing and ending in an official goal with a goalkeeper. Statistical analysis included Kruskall-Wallis’ H and Mann-Whitney’s U with Cohen’s d effect size. The SSGs presented walking and jogging intensity movements (0.7–7 to 7–14 km/h), with a 5-to-8 %HIA (high intensity activity, 16 km/h), where low intensity accelerations, decelerations and impacts were predominant (1–2.5 m/s 2 ; 5–7 G), and %HR MAX (maximum heart rate percentage) was between 70–90%. Only SSG4 presented similar demands to competition, finding differences between SSGs ( p 0.05; d = 1.40 ? 0.36). In conclusion, the objective of the SSGs directly influenced the demands on the players in training sessions. For this reason, it is important to monitor demands for designing specific training sessions.
机译：本研究的目的是：（a）根据目标确定正式比赛和小型比赛（SSG）的外部（eTL）和内部负荷（iTL）;（b）比较SSG之间的需求， （c）在为期一个月的比赛期间，分析与官方比赛有关的SSG要求。在四场正式比赛和12场训练期间，使用WIMU TM惯性设备（RealTrack Systems，西班牙阿尔梅里亚）记录了20名18岁以下的国家级足球运动员，其中进行了四个目标不同的SSG：（SSG1）保持控球; （SSG2）保持控球并不断进步; （SSG3）在迷你进球中保持控球，进步和终结; （SSG4）与守门员保持球，前进并以正式进球结束。统计分析包括Kruskall-Wallis的H和Mann-Whitney的U，以及Cohen的效应大小。 SSG呈现步行和慢跑强度运动（0.7–7至7–14 km / h），HIA为5至8％（高强度活动，> 16 km / h），其中低强度加速度，减速度和冲击力占主导地位（1-2.5 m / s 2; 5-7 G），％HR MAX（最大心率百分比）在70-90％之间。只有SSG4对竞争提出了相似的要求，发现SSG之间存在差异（p <0.05; d = 1.40 = 0.36）。总之，SSG的目标直接影响了训练课程中对运动员的需求。因此，监视设计特定培训课程的需求非常重要。

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