## 4 Discussion
Before proceeding with comparisons of the results with other studies, it is important to note that when speed zones are set with different thresholds or classification criteria, direct comparisons become difficult, as the resulting data may vary significantly depending on how each study defines and categorizes movement intensities. For example, what one study may classify as high-speed running could fall under a different category in another study with slightly adjusted speed thresholds. These inconsistencies can lead to misinterpretation of results or inaccurate conclusions when evaluating physical performance across different research contexts. Therefore, careful consideration must be given to the methodology used in each study, particularly the definitions of speed zones, in order to ensure valid and meaningful comparisons. In a study [12] with a similar design conducted on professional football players for the same formation (1-4-3-3), it was observed that in the first speed zone (6-11.8 km/h), Fs covered the shortest distance. It was also noted that the CMs covered the greatest distance in the first three speed zones (Z2: 11.9-15.7 km/h; Z3: 15.8-19.7 km/h). In the present study, in Z3, the CDs covered the shortest distance, findings that align with previous research [12; 27; 47], while the greatest distance in this zone was covered by the CMs. This observation is likely connected to the tactical role of this position, which requires constant positioning of the CM players based on the ball's position, the opponents, and teammates in the four phases of the game [48]. In the fourth zone, the most distance was covered by SMs, and the least by the CDs. The tactical role of CDs is primarily focused on the team's defensive function, and the area they cover in front of the goal does not allow them to cover long distances in high speed. Finally, the greatest distance at maximum speed was covered by the SDs, followed by the SMs. Similar findings are reported in previous studies [12]. The wide players (SDs and SMs) in the 1-4-3-3 formation have space on the flanks to make high-speed runs both during the attacking phase and during defensive transitions. Therefore, in this case as well, we observe that the tactical role of the position (active involvement throughout both the attacking and defensive phases), combined with the availability of space with fewer players, affects the running performance of the players. In a recent study [49] conducted on high-level young athletes (U17), it was observed that the CMs covered the greatest distance, while the Fs achieved high performances in Zones 5 and 6. Finally, the wide players SDs and SMs stood out for their performances in high-intensity and maximum-speed distances. From the results comparing the running performance between the two halves, it was shown that there was no significant difference in total distance. However, differences were observed in all speed zones. Generally, an increase was noted only in the distance covered in Zone 1, and a decrease in distances in all other zones. Previous studies present unclear results on this matter. Some studies report a decrease in distance covered in Zone 1 in the second half [28], while others did not observe any differences [12; 27]. However, at this point, it should be emphasized again that the methodology, such as the different speed zone thresholds, varies. In the present study, an increase in distance covered was observed for both CDs and CMs in Z1. In Z2, the CMs continued to increase their distance in the second half, while SMs covered less distance compared to the first half. As previously mentioned, there is considerable variation in the thresholds used to define speed zones across studies--for example, Zone 1 ranges from 6-11.8 km/h [12], 7.2-14.3 km/h [13], and 0-11 km/h [28]. Such discrepancies may contribute to inconsistencies in reported outcomes. Findings related to Zone 2 remain inconclusive in the literature, with some studies reporting maintained performance by Fs [12], and others highlighting the role of SDs [27].