Quote Originally Posted by Zeek View Post
I am a certified spinning instructor (STAR 3) with MDA. Although their program has lots of room for improvement (some--not all--of the CECs are stale and could use some revising) their organization is respected in the IDC community (but IMHO they lost some credibility when Johnny left). All in all, if you want to get certified to teach spinning, I would go through MDA. Reaction Cycling is taught for Bally Total Fitness. It's a Schwinn certification.
I agree with Zeek. I am MDA certified and was happy with my cert. The master instructor (MI) who taught me was great. MIs are not all created equal - most are probably good, but I know that there are some duds.

There are two indoor cycling instructor forums that are GREAT resources for all things pertaining to indoor cycling, like Innercycling.com.

One thing to add - if you are interested in training with power and know of facilities with CycleOPs studio bikes with power taps, or the new LeMond RevMasters with estimated power, you might look into the new certification from CycleOps. Some of the best MIs from MDA are now working for this program and it is THE platinum standard, in my opinion. Only worth it if you have the facilities nearby, though.