Mike Yamamoto talks about the web 2.0 fitness site revolution:

Don’t laugh, but physical fitness could be a powerful niche in the Web 2.0 world.

Clearly, tech companies have long seen the promise of the consumer health market, as Sony proved again recently with its introduction of a fitness-friendly Walkman. And serial dieters have found ways on their own to combine software with their regimens, such as personal spreadsheets.

Now, Web 2.0-oriented sites such as Gimme20, Traineo and PEERtrainer are trying to capitalize on the fitness trend. Sites that are even more finely defined, such as SugarStats.com, target specific health issues (in this case diabetes).