RE: When Cathe does 6
I admit, I never use an 8" step for anything, even when Cathe does. I have really short legs, and when I try to use 8", my knees get a little achy - it's just too much for me.
I have used 8" in BodyStep class at the gym, but I don't keep it at that height for the entire workout - I follow the instructor cues re: step height, and it changes several times during the workout, to give my knees a break.