I'm confused as well. HIIT is supposed to be short as well as only a few times per week and the Cathe videos are pretty long. So are just parts of Cahte's workouts considered HIIT or the entire video? I have seen some workouts on bodyrock that use intervals and you just do as many of the exercise as you can in 50 seconds then break for 10 seconds then repeat or another workout where you do as many as you can for 1 minute no break and just go onto the next for 30 minutes total. I am under the impression that those workouts you do everyday but those sound like HIIT to me so ??????
------
Actually I think the body rock type exercises are regular intervals. I remember the "HIIT" in turbo fire used a series of multiple exercises then repeat (4 jacks, 2 burpees, 4 side lunges, 2 jumps, repeat). In that sense, Afterburn with its one exercise at a time seems more like regular intervals. Then again, it kinda seems like my understanding of Tabata (which is HIIT) so I guess I'm still confused.