Football Defensive Actions Development in Small-Sided and Conditioned Games With Offensive Goals

With the use of small-sided and conditioned games (SSCGs), non-linear pedagogy (NLP), which is based on the ecological dynamics approach, has arisen with the aim of fostering a holistic perspective and optimizing players’ tactical offensive and defensive behavior’s. Given the potential injury and health risks associated with insufficiently structured training, such as overtraining or inadequate tactical preparation, the implementation of evidence-based approaches like NLP is crucial. In this study, the indirect impacts of an NLP-based intervention program (task design based on tactical attack principles and assaulting team’s numerical advantage) were examined in decision-making (DM) and execution (Ex) in U14 football defense technical-tactical actions. Twelve training sessions, split over two phases—preintervention and intervention—involved eighteen players (aged U14). 600 defensive actions measured during competitive matches were examined using the Game Performance Evaluation Tool (GPET) tool. The results revealed significant gains in marking (to the player with the ball: DM, p = 0.001; Ex, p = 0.001; and to the player without the ball: DM, p = 0.039; Ex, p = 0.046), blocking (DM, p = 0.015), and help- coverage (Ex, p = 0.014) actions. The interception and tackle actions did not differ noticeably. According to the results of this study, the NLP approach provides a suitable theoretical framework for fostering the development of defensive tactical behavior in football. Not all acts, though, saw improvements. In order to build technical-tactical training processes based on the phases of the football game (offensive and defensive) and taking the level of opposition into consideration, trainers should design representative tasks.