## 4 Discussion
The second zone (7.2-14.39 km/h) in this study was defined to include the distance covered at moderate running speed. In studies with professional players, this zone is narrower in terms of speed (\(\sim\)11-15 km/h), and it has been reported that CMs covered the greatest distance and CDs the least [18; 33]. Similarly, in this study, CMs covered the greatest distance, while Fs covered the least. The differences may be due to the different definitions of speed within the zone. The speed range of the third zone in this study is closer to that used in professional teams (\(\sim\)15-20 km/h). In this study, it was observed that the CM covered the greatest distance, with a significant difference compared to all other positions. The findings are consistent with those of previous studies with professionals [18; 35]. Many of the measures covered by midfielders are related to their positioning. Also, the tactical role of midfielders requires them to continuously move across spaces to connect the defensive and attackinglines offensively and to contribute defensively within the framework of the team's defensive tactics [36]. In the fifth zone (19.8-25.19 km/h), it was observed that the CDs covered the shortest distance. These findings are consistent with studies on professional football players [18]. Although previous studies have reported that the CDs, who cover the shortest distance in this high-intensity zone, also show the lowest performance in physical fitness tests [37; 38], we believe that the tactical role is what determines performance in this zone. In this study, regarding the sprint zone, it was observed that the SMs covered the greatest distance, with the Fs and SDs following. Earlier studies in professional players report that the SDs and SMs covered the greatest distances, while the CDs and CMs covered similar distances in this speed zone [18; 33]. As previously mentioned, the wide players and forwards covered the greatest distances at maximum speed (sprint). In professional soccer players, the findings are similar, with wide players covering the most meters. In this study, no differences were observed between the positions regarding the number of accelerations (ACCs) and decelerations (DECs) above 2 m/s\({}^{2}\) and below \(-\)2 m/s\({}^{2}\). However, earlier studies report that wide players (SD, SM) perform more ACCs and DECs, while CDs perform the least [39; 40]. Similar findings have been reported in studies conducted on young football players [19; 41; 42]. We could hypothesize that players in wide positions have more space, allowing them to reach higher speeds, which is why they record more ACCs and DECs than players in central positions. The central area is typically covered by more players in most formations, which limits the space for movement and the speed a player can develop. This, in turn, limits the number of intense ACCs and DECs. As mentioned earlier, this is one of the first studies attempting to create the profile of high-level young football players playing in the 1-4-3-3 formation. The playing position appeared to affect the distances players cover at different speeds. This study helps quantify the match demands, which in turn allows for the individualization of the external loads players will experience in the weekly training microcycle, with the goal of improving performance and preventing injuries. Although this study provides important information, it has some limitations. The sample used came from a professional team's academy, and both the number of players and matches were limited. Additionally, contextual variables (score, home game, or away game) that could influence running performance were not taken into account in this study. Furthermore, apart from the formation, the individual instructions given to each player by the coach and the overall philosophy of the coach regarding the team's playing style can influence running performance, but these were not considered in this study.