These kids are world class at 12 and 13 years old. At what age, and what compounds, do they use? growth? Something for recovery?
who is world class at 12-13 years old? (female gymnasts? )
DDR used to dope kids who were as young as 12-13. the chinese still do it today. (some coaches, not everyone....and mostly female gymnasts)
but its not common to dope athletes at that early age. 17-19 is more usual.