BACKGROUND: The Assessment of Tactical Dimension in Collective Sports, Specifically in Soccer, is an Individual and Collective Performance-Monitoring Alternative that is Constantly Updating. Its
Realization Has a Great Importance in Talent Selection Process, as Well for Monitoring the Advancement in Sports Specialization. Thus, the Present Study's Objective Was to Evaluate the Execution
Frequency of Offensive Tactical Principles in Soccer’s Junior Categories.
METHODS: The Sample Consisted of 33 Players, Being 12 of the U-13 (12.70±0.56 years) and 21 of the U-17 (16.21±0.59 years). The Execution Frequency of Offensive Tactical Principles Was Evaluated:
Penetration (PEN), Offensive Coverage (OFCV), Depth Mobility (MOB), Width and Length (WL) and Offensive Unit (OFUN), Though the Applications of GR3-3GR Test, Validated by Costa et al. (2009). The
System of Tactical Assessment in Soccer (FUT-SAT) Was Used. To Compare the Execution Frequency Between the Categories the Mann Whitney U test Was Applied. The Statistical Significance Was Set at 5%.
RESULTS: In the U-13, the Principle Accomplished with Lower Frequency Was Penetration (md=2.00) and the Major, Width and Length (md=11.00). Regarding U-17 Category, the Lowest Score Was in Depth
Mobility (md=1.00) and the Major, Width and Length (md=12.00). Comparing the Categories, Results Show that Players from U-17, Performed More Frequently the Offensive Coverage (p=0.00) and Offensive
Unit (p=0.03). The Execution of the Others Offensive Principles didn’t Differ Significantly (p>0.05) Between Compared Categories.
CONCLUSION: The Evaluated Young Soccer Players Seek More Frequently to Extend the Team’s Effective Playing Area in Width and Depth (WL) and Less, Progress with the Ball Toward the Goal (PEN) and
Perform Breaking Movements in the Last Defensive Line (MOB). The Greater Constancy in Realization of Offensive Support by U-17 Suggests the Perception of the Importance to Ensure the Continuity of
Ball Possession by the Team. The Maintenance of Principles Execution Frequency as Mobility and Width and Depth Between Categories Suggests Similar Levels of Tactical Awareness During a Match. However,
the Implementation Quality of these Principles Can be a Factor that Significantly Evolves During the Training Process, Requiring Therefore a Qualitative Approach to Evaluate this Dimension.