I know a guy at the gym who hasn't been training more than a few months. He told me what he was doing for chest and that he never gets sore. I pushed him Friday night to the point where I know I would have been sore the next day, and he just told me that he never did get sore. The only thing he takes is one protein shake a day, so I know that's not it. He's tall and very skinny. Is it genetics or what? Just because he doesn't get sore doesn't necessarily mean that he's not lifting properly or hard enough does it?