heavy weight programs do not stunt growth. Arnold Schwarzenegger, Lou Ferrigno, Shaquille O'Neal all started heavy weights programs in their early teens between 14-16 years old, they all grew to be over 6'1. IF YOU Want a career in rugby and to get noticed early, lifting weights will = Stronger and faster. "Children &adolescents have growth plate at the end of most bones. Growth plate regulates the length &shape of bones. Bone grows around growth plate, not from the center outward. Growth plate is the last part of bones to harden. This makes it more vulnerable to fractures which can cause problems like unequal bone length. Weight lifting can stunt your growth if you damage growth plate." Weight lifting remains the safest sport when done correctly. Safety depends on proper technique, which your learn best using light weights. Weight Lifting for Youth. Weight lifting strengthens bones &muscles which can prevent injuries in other activities