Figure 1. Accumulated playtime in minutes over the 6-month period for each cohort. lbHPT: later-born players who played above the median playing time per player per team; lbLPTcomp: later-born players who played below the median playing time per player per team and received compensatory training; lbLPTreg: later-born players who played below the median playing time per player per team and did not receive compensatory training.