AUTHOR=Abreu Cristóvão de Oliveira , Aburachid Layla Maria Campos , Lima Igor Mendes , Moura Felipe A. , Bedo Bruno L. S. , Ribas Schelyne , Praça Gibson Moreira 

TITLE=Impact of implicit vs. explicit Instructions on tactical performance in under-20 soccer players

JOURNAL=Frontiers in Sports and Active Living

VOLUME=Volume 6 - 2024

YEAR=2024

URL=https://www.frontiersin.org/journals/sports-and-active-living/articles/10.3389/fspor.2024.1441125

DOI=10.3389/fspor.2024.1441125

ISSN=2624-9367

ABSTRACT=This study aimed to verify whether implicit and explicit informational constraints generate differences in tactical performance and behavior in U-20 national-level soccer players. Thirty-two under-20 male athletes from two clubs participated. Four 4-a-side small-sided games (SSG) protocols were used: R1 -explicit rule for high-press marking, R2 -implicit rule for high-press marking, R3game with both previous rules simultaneous and FR -free game, without additional rules. SSGs comprised 4vs4 + goalkeepers games on a 42m x 29m field. Position data from 10 Hz Global Positioning System (GPS) devices were used to evaluate individual and collective tactical behavior (spatial occupation metrics) and performance (interpersonal coordination). MANOVA was used for normally distributed variables, and Friedman's with Dunn or Bonferroni post-hoc was used for variables without normal distribution. For SEI, an ANOVA was used with Bonferroni post-hoc. The R1 protocol showed higher SEI, length, width, and LpWratio than the FR protocol (p=0.009). There was an effect of the different protocols in SEI values (p<0.001). Under the explicit rule, players also showed the highest in-phase interpersonal coordination values (p<0.001). Providing players with explicit tactical instructions improves tactical performance acutely for high-pressing defensive actions.