Dose–Response Relationship Between Training Load and Changes in Aerobic Fitness in Professional Youth Soccer Players

To compare the dose-response relationship between traditional arbitrary speed thresholds versus an individualized approach, with changes in aerobic fitness in professional youth soccer players.A total of 14 youth soccer players completed a 1500-m time trial to estimate maximal aerobic speed (MAS, km·h-1) at the start and at the end of a 6-week period. Training load was monitored on a daily basis during this study. External load measures were...