Abstract
The aim of the study was to extend the knowledge about the internal load of elite young soccer players in small sided games with different parameters in the category under 19 years. The group consisted of 16 elite soccer players under the age of 19. This team competed in the first league of the same age category We have monitored the time spent by players in bio-energy load zones (percentage of maximum heart rate), in small sided games with 2 players against 2, 3 against 3, with the size of the playing field of 25 × 18 meters and 30 × 25 meters. We used basic mathematical and statistical characteristics and Wilcoxon t-test for non-parametric selections. Our study confirmed that in the category under 19 years is valid that the larger number of players (3:3) in small sided games, indicates the players to spend more time in bio-energy zones 4 and 5. Direct correlation also applies to the size of the playing field, depending on the time spent in the load zones 4 and 5. The larger dimension of the pitch indicates to more time the players spend in bio-energy load zones, which is considered to be focal for us. If we want to use them as a way of complex training program (game training), then the small sided games are suitable training strategy.