# Lifting weights and taking protein supplements to get bigger (this is only appropriate for high school students, before the age of 14 or 15, kids usually don't have enough testosterone to build muscle and weight training before 14 can be dangerous). | # Lifting weights and taking protein supplements to get bigger (this is only appropriate for high school students, before the age of 14 or 15, kids usually don't have enough testosterone to build muscle and weight training before 14 can be dangerous). |