I've been thinking lately about how some people have larger muscles and are weaker than some people that have smaller muscles. I was wondering how these people became the way they are. What did they do that makes their muscles different than the other guys. I know some people say body builders never really do super heavy sets and look at how big their muscles are. And sometimes you look at power lifters and they don't really seem that big. But then they go benchpress 7 or 8 hundred pounds. So what makes them different? Diet? lifting techniques? amount of sets? resting? I know body builders do a lot of sets, so maybe their muscles are super compensating for how low their glycogen levels were and filling them back up with even more and that's what makes them big???