Preface: All right so I think this is a really dumb question to ask but there is actually some basis behind it.
So i'm coming home from college this summer and my brother sees that i've been making pretty decent gains in the gym in a little under a semester. I've worked out on and off for years but this is the only year i've actually tried to train. Anyways, my brother is sick and tired of being skinny and wants me to help him put muscle on. I keep telling him with his skinny frame (visible striations in his shoulders, quads, etc.) that any amount of work he puts in the gym he will just about immediately see. The only problem is that he is just turning 15 next month, and i'm worried about pushing him too hard or hurting him.
The reason i asked is that the last time i went in to the rec center (very small center with bodybuilder.com type of staff i.e. NO-Xplode) the guy working the desk in the weight room said my brother could come in, but he was not allowed on the squat machine. I was curious as to why, and i think i heard something like stunting his growth or some shit like that. Now in my head i called bullshit and just forgot the whole thing, but the entire situation had got me thinking.
Now i am by no means a pro at weightlifting but i know what good bench, deadlift, and squat form is. I was thinking about getting my brother in rotation in all 3 of these lifts and maybe some structure from West side for skinny bastards.
So my ultimate question is: can a 15 year old do the 3 major lifts, safely and without any repercussions? Also is the guy at the Rec full of shit?
Also.. after doing some research i realize 1RM's are a no-no for beginners, which i don't think i would have implemented anyways.
Questions and comments are very welcome.