gym bodybuilding

what is the normal age to join gym or start bodybuilding.?

what is the normal age to join gym or start bodybuilding. whether a 15 year boy start gym then his height or growth will be stop or what.

From my own personal experience, serious weigthlifting regiments started when I was a freshman in highschool, so 14. That was for football. You may not add much muscle when you’re young, it depends on the individual body. But it certainly won’t stunt your growth. I’d say as long as any kid is past puberty it’s ok to start lifting. Just know your limits and don’t overdue it.