## 1 Introduction  
Based on data from Activate Consulting in 2023 [1], the video games industry supports over 220,000 jobs in the United States alone. Moreover, the global investment and spending on video games increase by 8% every four years, with expenditures reaching USD 184 billion in 2022 [2]. These figures signify a growth of more than 40% within two years and forecast a consistent annual increase of 20% to 40% [2]. As the video games sector expands, certain games have evolved beyond mere entertainment to become competitive esports. These games are organized by institutions, operate within regulated leagues and competitions, and promote the formation of competitive teams akin to those in traditional sports [3]. The phenomenon of esports has burgeoned into a significant economic and social phenomenon, drawing audiences on par with traditional sports [4, 5]. For instance, popular esports, such as League of Legends and Valorant, attract between 400,000 and 500,000 viewers on average in both Asian and European leagues [6]. [PERSON] et al. [4] highlighted that esports garnered over 60 million new viewers in 2017, outpacing the NBA, which attracted 20.4 million new followers. This underscores the growing appeal of esports, capable of drawing larger audiences than traditional sports. Particularly, League of Legends (LOL) stands out as a pivotal competitive E-sport [7], being the most watched game globally and highly esteemed in the competitive realm. Itboosted an audience of 200 million viewers at its World Cup, surpassing the Super Bowl's viewership of 103 million [8]. The rise of LOL has paved the way for players' professionalization, enabling them to achieve economic standings comparable to those of traditional sports stars [5; 8; 9]. This professional commitment demands daily training sessions lasting 6 to 10 h [10]. Consequently, [PERSON] et al. [11] argue for the recognition of health and injury prevention in these athletes, advocating for a balanced lifestyle and incorporating specific physical conditioning into their regimen. Similarly, [PERSON] et al. [12] identified injuries in esports, primarily related to fatigue and overtraining, affecting the shoulder, wrist, and back areas. Furthermore, the sedentary nature of esports poses risks of obesity, heart disease, and diabetes, threatening the health of both professional and amateur players [8]. Acknowledging the prevalent issues faced by esports players, incorporating physical exercise into their routines could offer a distinctive advantage. Physical training aids in managing muscular stress without reaching pain thresholds, enhancing effort perception and muscular fitness [13]. This approach could delay fatigue onset, potentially improving in-game performance [13; 14]. Moreover, physical exercise's role extends to enhancing cognitive abilities [15]. With esports players facing psychological challenges and the necessity for high cognitive performance, it is crucial to implement intervention strategies that address both physical and psychological aspects [16; 17]. These strategies could enhance decision-making and information processing [3], and reduce stress and anxiety [18; 19]. Therefore, the inclusion of physical activity as part of the esports player's routine is key to enhance their health, as well as the competitive performance, both physically and psychologically [8]. Nonetheless, to effectively apply physical training programs targeting fatigue reduction, it is essential to measure this variable accurately [20]. Considering the specific conditions and regulations of competition venues, employing expensive laboratory tests is impractical [21]. Thus, assessments should rely on methods that are accessible and straightforward for team staff. [PERSON] et al. [8] conducted a study with occasional esports players, demonstrating significant performance improvements through physical exercise participation. However, research focusing on fatigue's impact on players during actual training sessions, particularly for professional teams, remains scarce [9; 22].