Table 1. Mean (SD) demographic characteristics of participants.

Age, years	15.6 (.5)
Time from peak height velocity, year	+3.1 (.5)
Height, m	1.64 (.06)
Body mass [kg]	56.8 (5.8)
Fat mass [%]	17.3 (3.7)
Average soccer training volume, sessions per weeks	9.3 (.5)