i started bodybuilding at the age of 13, i'm 5ft 10".... my family is under that height so few can say that it stunted my growth.

Its linked to a cautionary tale of teen bodybuilders who use steroids, using steroids that young causes an influx of testosterone leading to a premature capping of the long bones.

There is no evidence to support either argument but i've yet to see a 5ft midget complaining that working out affected his genetics.