san jose state kinesiology professor tamar semerjian says there's a science to it. pushing to a new level is something all humans crave. that sense of accomplishment that sense of doing the new thing. getting further, getting faster. pelkey's coach todd robinson says what athletes do is not easy. both in and outside of the weight room. balancing school and work is tough enough, but throwing another responsibility into the equation is brutal. well it takes a certain "i can do it" attitude. their kind of a stick-to-itiveness. you take on a project and you stick to it. and it takes that. it takes somebody that wants to do it. and wants to get better. though it may sound like another job, ultimately it's an escape for him. it's him, and the weights, and his mental fortitude. when i'm sitting in class are sitting through a work shift, it's almost like the light at the end of the tunnel. when we come back we'll sit down with some impressive athletes. tipping the scales towards their sport. [music] welcome back to this edition of equal time. today our focus is on weightlif