I am sick and tired of these people who blatantly cheat on their moves during our cardio gym classes. In a way, I shouldn't be; after all, it's their time, their money, and their business. At the same time though, I find it darned irritating, especially since this tends to be distracting and it brings the energy level of the class down.
I'm talking about the gal who comes in late during our Saturday Hi-Lo class, for example, takes up a spot in the front of the room, and who barely moves. What's more, instead of doing a grapevine -- a mildly vigorous lateral motion -- she simply faces sideways and slowly shuffles in the direction of travel. Good grief. If you're going to do that, you may as well stay at home or walk slowly on the track.
Or the guy who, instead of doing trunk twists, just kinda swings his arms back and forth. He's not really working out his body; rather, he's just moving his forearms a little bit. I suspect that he's gotten so used to moving minimally in the course of his day that he's used to finding ways to sorta-kinda mimic a move without actually doing it.