According to WeightTraining.com, there is no negative impact on growth when lifting weights correctly. Improper lifting techniques cause a number of injuries in the body, however, including damage to growth plates.
WeightTraining.com says that children and adolescents have growth plates at the ends of all their bones. The function of these growth plates is to help determine how much a bone grows. Since the main bones grow around growth plates, these plates are the last of the bones to harden in the body. This makes them extremely vulnerable to breaks and fractures. Damaging these growth plates alters the growth rate of the bone that is attached. This leads to an imbalance in the growth of the attached bone.