The first time I did IMAX 3, I also did it on an 8" step - since I do the other IMAX's on that height. OH MY GOSH! Just like you said Diane - I definitely had to lower it for interval 7 - nowe, I do it on a 6" step and I still struggle with interval 7. Meaning catching my breath!
I absolutely love this new series - I had a hard time mopping all my floors tonight, since I did Chest & Triceps last night - my triceps are still screaming - but I love it!
Cheryl