Effects of pitch size and set configuration on mechanical responses and fatigue induced by different small-sided games in soccer

Introduction: Physical match actions are simulated through modified games. Pitch size and set configuration seems to influence the physical responses during small-sided games. Objective: The aim of the present study is to analyze the effects of pitch size and set configuration during small-sided games. Methodology: Fourteen young male field soccer players performed three small-sided games, involving 7 vs. 7 + 2 goalkeepers: 3 x 8 min with 5 min of rest between sets on a 68 x 40 m pitch (194 m2); same pitch area but 6 x 4 min with 2 min of rest (194 m2); and 6 x 4 min with 2 min of rest on a 40 x 34 m pitch (97 m2). Vertical jump, kick velocity and sprint were assessed to examine the residual fatigue before and after each small-sided game. Results: Larger pitch sizes showed significantly higher physical demands. Shorter bouts demanded greater distances at high intensity than longer bouts. A significant SSG x time interaction was observed for 10-m sprint time (P = 0.04), where a greater impairment was observed after completing 6 x 4 min (194 m2). Discussion: Higher external loads have been observed during games on larger pitches. A 4 min bout was provided as the optimal physical training stimulus. Conclusions: Larger pitch sizes and shorter bout durations are higher-demand games than smaller pitch sizes and longer bouts. Sprint performance is impaired after completing every small-sided game, especially acceleration capacity after completing modified games involving larger pitch areas and shorter bout durations.