I would like to hear about why the extra moves in RPM are considered dangerous?
Is it only dangerous in Spinning, whereby instructors may not be correctly coaching body position/resistance/pace (which can happen in RPM too, but hopefully ongoing education/quarterlies would help to correct), or is there a physiological impact that Les Mills (and their advisors) have been unaware of?
Or is it the Spinning fraternity trying to dissuade people from RPM, using negative feedback?