From a scientific point of view, Small-Sided-Games (SSG) provide reliable internal- (such as HR, RPE, and blood lactate concentration) and external responses (such as total distance covered) and therefore can be used as a conditioning format (39).
As mentioned on previous sites, SSG seem to have many advantages (such as football specific movement, technical training, possible tactical improvements and inherent high motivational factors for training) over other conditioning formats (13, 16, 20, 25, 35). It seems that coaches, who in particular have only limited amount of time with the players, might benefit from SSG as they might increase the efficacy of training (39) and even reduce the total training time because of the multi-functionality of SSGs (13, 38), especially in youth players (40).
Besides improvements in the aerobic endurance (9, 25, 28, 29, 36), and anaerobic endurance (29).....
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