CNNW CNN Presents July 29, 2012
when you beat somebody in the ring, you're not just beating them up or something. you're like beating the entire symbolism of them. you're beating who they are. >> marlen es pars is full of runs. how much to eat and crunches and how many endless hours of training will it take to win. why are you here every day? because i want to win. this is my life and this is what i do. like and i can honestly say, like this is who i am. you see it. this is what i do. >> reporter: marlen is a trainer in boxing. >> i've seen her come in and she's all like just pouring down with sweat and when she is...