@Irarenovo: Ooo, what website is it?
I've thought about it too, but honestly, I hope no one's taking it so seriously that they would chastise you for modifying things where the fitocracy hasn't included them. The point is to get in shape, right? You could always make a note that you did a different version of the exercise, or record a number of reps that you think would be equivalent to whatever it is the website has.
Cosplys for Fanime '11:
* Juri from Super Street Fighter 4