I read this article in an NSCA journal and found it online at
http://www.schreiner.edu/academics/exsi/2009/EXSI-SuitArticleVol8.pdf
It recomends running in a 3mm or 6mm wetsuit because it is supposed to create elastic resistance to all parts of the body and increases muscle firing. But i didn’t see any actuall research referenced for its effectiveness. Maybe just another in a long line of gimmicks. Pretty interesting though. Thoughts?