The Most Demanding Match Periods in Youth Male Soccer: Analysis by Age Groups and Playing Position

To quantify and compare most demanding periods (MDPs) of match play in soccer for total distance, high-speed running distance, and sprint distance across 1-, 3-, and 5-minute periods, examining both positional differences and age groups (under 17, under 19, and under 23) in youth male soccer players.

Sixty-eight outfield players from the same professional academy (under 17: n = 24, under 19: n = 23, and under 23: n = 21) competing in top national divisions were monitored over 50 official matches using 10-Hz global navigation satellite system units (Catapult Vector S7). MDPs were identified using the rolling average method for each period. Linear mixed models compared MDPs among positions and age groups, with Bonferroni-adjusted post hoc tests and effect sizes (Cohen's d).

No differences were observed between age groups for any metric or period length (P > .05). However, positional differences were found. Center backs consistently exhibited the lowest values across all metrics (P < .05; d = 1.18-2.72), while midfielders showed similar sprint distance values to center backs. Strikers and wingers presented the highest sprint distance MDPs, whereas midfielders and strikers recorded the highest total distance MDPs. Shorter time windows produced higher relative values (in meters per minute) across all metrics.

From under 17 onward, highly trained male youth players displayed comparable external load demands during the MDPs of match play, irrespective of age group. Conversely, MDPs were strongly position-dependent, reflecting distinct tactical and physical demands. These findings reinforce the importance of position-specific training while ensuring all players are prepared to cope with atypical high-intensity demands during match play.