Wow! EXCELLENT is the only word for this.
This is true interval training, wherein you raise your heart to an anaerobic level for short periods, then bring it back down. The effectiveness is truly amazing. You *will* burn fat with this, and you *will* increase your aerobic capacity (provided you stick to it, of course!).
The length of the aerobic section is 25 minutes. I think another 5 or 10 minutes would be even better, but 25 minutes in this format is enough to burn fat. I've read some comments on the forum about it being too short, but, remember, this is not traditional aerobics. We've been conditioned to think we *have* to be at 80% for 45 minutes (or whatever), but interval training is a whole different puppy and works differently. And the results are proof in and of themselves!
I hope this video is the beginning of a new trend in workout videos. I'd like to see interval workouts by people like Kari Anderson, the FIRM, and all the other "stars."
This workout deserves an A+!

Instructor Comments:
The 5 instructors are all National Aerobic Champions, and they are: David Dixon, Nikki Helt, Sharon Meredith, Michelle Nevidomsky, and Giselle Roque de Escobar. They're all very good. Something about Giselle gets on my nerves a little bit, but I can't put my finger on what it is! But that's okay, she's not a total turn-off or anything like that!

Annie S.