So, a friend of mine has asked to help train his little brother, who is 14, and I've been taking him around and working out with him. Just trying to figure out what would be the best approach to workout with him; is there chance to stunt growth or is that kind of an old myth? Can I gradually start working him out hardcore? I.e. sets of 8 - 10 reps or whatnot or keep him at the higher rep range?
I've been focusing on having him understand form before anything else, but his goal is to play football, so he would probably enjoy growing, and he is in prime time for doing so.
Any thoughts or suggestions?