The aim of this study was to investigate changes in the linear running speed (LRS) for 30 m, change of direction speed (CODS), and endurance in young elite Czech soccer players.
The results of this study showed the impact of training and match load at different stages of the training cycle for linear running speed, changes of direction speed and endurance in young soccer players. These results may serve as an indicative basis for comparison with peers in similar research studies. We observed that the performance of speed and the ability to quickly change direction of the players improved throughout the observation period. For endurance, we observed a major improvement during the pre-season training period, while at the end of the season, endurance slightly fell. We conclude that the training process in youth plays an important role in the development of young players and positively affects the development of individual components of athletic performance.