## 1 Introduction
The same review also found that accuracy was impaired after inducing mental fatigue. In another review conducted by [PERSON] et al. [21], they assessed performance after fatigue protocols using the Loughborough Soccer Passing Test (LSPT) and the Loughborough Soccer Shooting Test (LSST). In the passing test, they increased the time to perform the task and the penalty time. In the shooting test, scores and shot speed decreased. Finally, in a study by [PERSON] et al. [22], following a fatigue protocol (Stroop test), technical performance was evaluated using LSPT and the LSST, showing that both passing and shooting performance decreased due to mental fatigue. Previous studies' limitations include the fact that mental fatigue has been assessed primarily using subjective scales. Assessing mental fatigue from the point of view of the loss of performance in a task can be interesting and objective, as opposed to using scales on the perception of fatigue reported by the athlete. Additionally, protocols used to induce mental fatigue are often considered to lack ecological validity [23], which may lead coaches and physical trainers to perceive them as less useful. Moreover, the duration of cognitive tasks can vary significantly across studies investigating mental fatigue. In a previous review, [PERSON] et al. [7] excluded tasks shorter than 30 min, arguing that such brief durations do not produce sufficient mental fatigue or cognitive load to negatively impact subsequent physical performance. However, the literature on self-control and ego depletion [24] presents evidence that shorter tasks can substantially diminish the availability of mental resources, thereby affecting physical performance [25]. In this regard, previous studies have tried to induce mental fatigue with 10 min [18; 25] and 12 bouts of 30 s (6 min) [26; 27], applying the Stroop test. Similarly, the practice of soccer analytical tasks of less than 6 min has been sufficient for young players to reach vigorous physical activity values [28]. Moreover, previous studies have found that two consecutive chess tasks of 2 min and a half can reduce heart rate variability as a consequence of cognitive tasks [29]. Furthermore, a recent meta-analysis [25] indicated that the duration of the prior cognitive task does not reliably predict the magnitude of subsequent performance impairment. This raises questions about the importance of task duration, the minimum dose required, and potential individual differences in resilience to mental fatigue. To address these complexities, some researchers [30; 31; 32] have suggested that shorter, more complex, and individualized cognitive tasks, such as dual-task, can induce mental fatigue more effectively and quickly than longer standardized tasks like the AX-Continuous Performance Task. However, it has not been explored whether it is possible to achieve this state of mental fatigue with even shorter trials (less than five minutes), which could expand the range of possibilities in the design of training tasks focused on the manipulation of mental fatigue. In addition, isolating the effects caused exclusively by mental fatigue is a crucial aspect to know if the physical component is not influencing and thus be able to develop more specific tasks for players to improve cognitive aspects. Thus, this study aimed to analyze the influence of mental fatigue on soccer players' performance in decision-making, response time, and technical execution accuracy, utilizing a 2 min incongruent Stroop test. This cognitive fatigue test is designed to approximate the ecological contexts found in soccer training, simulating real-game situations by integrating key skills such as decision-making, accuracy, and technical execution under conditions of mental fatigue. We hypothesize that this specific test, by inducing mental fatigue, will lead to increased response time, reduced accuracy, and correct decision-making.