Fig. 1

Correlation coefficients (95% CI) the minutes of playing soccer player in the compositions with the skeletal age (yrs); maturity offset (yrs); Soccer training (mo); VO_2max (ml g⁻¹ min⁻¹); Fatigue index (s); CMJ indicates the best of countermovement jumps performance (cm); GH, and IGF1 levels (ng/dl)