Agility development in youth soccer: the efficacy of fixed-role small-sided games

Abstract

Purpose: This study aimed to evaluate the impact of Fixed-Role Small-Sided Games (FRSSGs) on youth soccer players' agility and its components: reaction time, linear speed, and change-of-direction speed (CODS). Methods: Thirty-one male U-12 regional soccer players were randomly assigned to the FRSSG group (n = 16; age: 10.63 ± 0.48 years) or the control group (CON) (n = 15; age: 10.89 ± 0.31 years). The intervention program lasted 18 weeks. Pre- and post-intervention tests assessed reaction time, linear sprint speed (10 m and 20 m), CODS (505 and zig-zag tests with/without the ball), and agility (Y-shaped with/without the ball and multiple-signal tests). Statistical analysis included paired t-tests, repeated measures ANOVA, and effect sizes (Cohen's d). Results: Significant baseline differences were observed between groups in 10-meter linear speed, and zigzag test performance (p < 0.001, d = 2.195), and Agility Multi-signal Test (−8.42%, p =.002, d = 0.821). Significant between-group differences favoring FRSSG were found for the 505 Test (p = 0.005, η2 = 0.038), Zigzag Test (p