I saw this guy training at my gym (no i wasnt checking out guys ) doing a lot of sets on his biceps. But the funny thing is that ALL he was doing was biceps. Curls, hammer curls, dumbell curls, cable curls, basically every exercise you can find in the book, for a whole hour. Thats its, just biceps for an hour. Probably 40+ sets when he was done, and then he left the gym. Looked like WAY overtraining to me.
BUT here's the problem (in comparison to my own HST style of training) - THE GUY HAD GUNS. The kind of biceps that make someone look like they obviously work out.
I guess some people just respond well to extremely high volume? Or is this just an injury waiting to happen?