Five years after jilting his pregnant fiancée on their wedding day, out-of-shape Dennis decides to run a marathon to win her back.
 
No review.  Just a quote from the movie.
 
Gordon: Go on then, run!
Dennis: Isn't there some kind of like... special technique?
Gordon: Well... yeah... you put one leg in front of the other over and over again really really fast.
 
Nuff said.
 
FUN FACT:  On the March 21st edition of Late Night with Conan O'Brien (1993), Director David Schwimmer discussed the scene between Hank Azaria and Simon Pegg that takes place in the locker room. Generally, if males have to be nude for a scene, they will use a nude (flesh)-colored pouch to cover themselves. However, for some reason, the pouch wouldn't stay put, and Azaria ultimately decided to forgo wearing it, but told Schwimmer not to say anything to Pegg. The reaction of shock we see from Simon Pegg when Azaria drops his towel is genuine.