NIH...Turning Discovery into Health
Musculoskeletal Effects
The benefits do not outweigh the known harmful consequences. With kids, I'm very honest about my past use and explain that I know where they're coming from on this one. I remind them that as teenagers, they are not done growing, and that continued use of steroids will prevent them from reaching their full height potential.
Source: Drugstory.org
Steroid use during childhood or adolescence, resulting in artificially high sex hormone levels, can signal the bones to stop growing earlier than they normally would have, leading to short stature. Other drugs may also cause severe muscle cramping and overall muscle weakness.