Area per player in small-sided games to replicate the external load and estimated physiological match demands in elite soccer players

Abstract

The current study determined the area-per-player during small- or large-sided games with or without goalkeeper that replicates the relative (m{middle dot}min-1) total distance, high-intensity running distance, sprint distance and metabolic power covered during official matches. Time-motion analysis was performed on twenty-five elite soccer-players during 26 home-matches. A total of 2565 individual samples for SSGs using different pitch sizes and different number of players were collected and classified as SSGs with (SSG-G) or without goalkeeper (SSG-P). A between-position comparison was also performed. The area-per-player needed to replicate the official match demands was largely greater in SSG-G vs SSG-P for total distance [187{+/-}53 vs 115{+/-}35 m2, effect size (ES): 1.60 95%CI 0.94/2.21], high-intensity running distance [262{+/-}72 vs 166{+/-}39 m2, ES: 1.66(0.99/2.27)] and metabolic power [177{+/-}42 vs 94{+/-}40, ES: 1.99(1.31/2.67)], but similar for sprint distance [(316{+/-}75 vs 295{+/-}99 m2, ES: 0.24(-0.32/0.79)] with direction of larger area-per-player for sprint distance > high-intensity running > total distance {cong} metabolic power for both SSG-G and SSG-P. In SSG-G, forwards required greater area-per-player than central-defenders [ES: 2.96(1.07/4.35)], wide-midfielders [ES: 2.45(0.64/3.78)] and wide-defenders [ES: 3.45(1.13/4.99)]. Central-midfielders required greater area-per-player than central-defenders [ES: 1.69(0.20/2.90)] and wide-midfielders [ES: 1.35(-0.13/2.57)]. In SSG-P, central defenders need smaller area-per-player (ES: -6.01/-0.92) to overall replicate the match demands compared to all other positions. The current results highlight that soccer players need a specific area-per-player during the small-side games with or without goalkeeper to replicate the overall match demands, especially to perform high-intensity running or sprint distance. Additionally, central defenders, central midfielders and forwards need to be trained with tailored area-per-player or specific rules/additional exercises.