I'm sure many of you are already aware of this article on about.com It reviews a couple of studies that try to explain why swimmers tend to have more body fat than other athletes.
Thought if you weren't aware of the article you might find it interesting.
swimming.about.com/.../offsite.htm
Lainey
Parents
Former Member
Here's an off-the-wall factoid on this subject: Gwen Stefani joined her high school swim team to lose weight. Seems to have worked pretty well.