Effects of An Eight-Week Differential Training Program on Tactical Efficiency in Under-18 Football Players: A Controlled Experimental Study

Abstract

This study examined the effects of an eight-week differential training program on tactical efficiency in under-18 football players. A controlled experimental design with pre- and post-intervention measurements was adopted. Twenty-four male youth players were allocated into two equivalent groups, with 12 players in the experimental group and 12 in the control group. The experimental group completed a differential training program three times per week for eight weeks, resulting in 24 training sessions, while the control group continued the conventional training program prescribed by the team coach. Each differential training session included three exercises, with five varied situations per exercise. Training variability was introduced through systematic changes in speed, distance, movement direction, pressure intensity, number of ball touches, player positioning, playing space, direction of attack, and type of finishing. Tactical efficiency was assessed using three football-specific tests: the Tactical Linking and Scoring Test, the Complex Tactical Performance and Scoring Test, and the Tactical Performance with Change of Direction and Scoring Test. The results showed significant pre- to post-intervention improvements in the experimental group across all tactical efficiency measures (p < 0.001). Post-test comparisons also revealed significant differences between the experimental and control groups in all six outcomes, favoring the experimental group. The largest between-group differences were observed in the Tactical Linking and Scoring Test for completion time (t = 7.865, p < 0.001) and performance score (t = 12.725, p < 0.001). These findings indicate that differential training can effectively enhance tactical efficiency, decision-making, and adaptive tactical performance in youth football players by exposing them to continuously changing and representative game-related conditions.