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The Interaction of Fitness and Fatigue on Physical and Tactical Performance in Football

M. Mandorino,Tim J. Gabbett,A. Tessitore,Cédric Leduc,Valerio Persichetti,M. Lacome

Published 2025 in Applied Sciences

ABSTRACT

Elite football players face increasing physical and tactical demands due to rising match schedules emphasizing the need for effective load monitoring strategies to optimize performance and reduce injury risk. This study integrates fitness and fatigue indices derived from a machine learning approach to develop a performance score based on Banister’s fitness–fatigue model. Data were collected over two seasons (2022/23 and 2023/24) from 23 elite players of an Italian professional team. Fitness was assessed via heart rate collected during small-sided games, while fatigue was evaluated through PlayerLoad recorded during training sessions; both were normalized using z-scores. Match outcomes, including physical (e.g., total distance, high-sprint distance) and tactical metrics (e.g., field tilt, territorial domination), were analyzed in relation to performance conditions (optimal, intermediate, poor). Results revealed that players in the optimal performance condition exhibited significantly higher second-half physical outputs, including total distance (z-TD2ndHalf: p < 0.05, ES = 0.29) and distance covered at >14.4 km/h (z-D14.42ndHalf: p < 0.01, ES = 0.52), alongside improved match tactical parameters as territorial domination (%TDO2ndHalf: p < 0.01, r = 0.431). This study underscores the utility of invisible monitoring in football, providing actionable insights for weekly training periodization. This research establishes a foundation for integrating data-driven strategies to enhance physical and tactical performance in professional football.

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