answer: Paul is fit because he exercises very often while #Person1# hardly ever exercises.
documents: #Person1#: You're really fit, Paul. Do you exercise very much?
  #Person2#: Well, I almost always get up very early, and I lift weights for an hour.
  #Person1#: You're kidding!
  #Person2#: No. And then I often go Rollerblading.
  #Person1#: Wow! How often do you exercise like that?
  #Person2#: About five times a week. What about you?
  #Person1#: Oh, I hardly ever exercise. I usually just watch TV in my free time. I guess I'm a real couch potato!