Nathan Carroll is a push-up machine. The exercise has taken a toll on his hands and created a worn spot on a section of his beige living room carpeting between his coffee table and 75-gallon fish tank filled with orange, well-fed goldfish. By the time we arrived at his home at about 1:30 p.m. Thursday, Carroll had already recorded about 4,500 push-ups. And if it everything goes as he believes it will, Carroll will set the world record on June 13 for the number of push-ups in 365 consecutive days. A log book, illustrated by his children, tracks Nate Carroll's daily push-up totals as Carroll continues his quest for a world record that has stood since 1989.