You can lift at 13-14. Basically, by this age, your body is done developing (not height and weight) but your bones and such. You wont stunt your growth unless you do it before 13.
Avoid the weight lifting bashers who believe weights are the worst things ever and only want to do push ups cause Bruce Lee did them.
If youre over 13, get into weights bro. Itll help you out a lot. REMEMBER start slow and get a good beginner routine. Good luck |