This is probably late but I thought I would share my experience with Interval Max.
I hated step workout before I tried Cathe's. When I got my interval max (Feb 2002), I tried it and found it impossible to even complete the warm up. Needless to say, I decided not to touch it again!
Then one day, after I mastered body-max (took me 2 weeks I think of every day stepping) and was improving my intensity, I decided to try Interval Max again. Once again, I failed to get past the 1st drill.
So I shelved that program and didn't touch it for an entire year thinking it was a mistake even trying that workout.
Last month, almost after 1 year of not touching the workout, I decided to try Interval Max again. This time however, I was able to complete 2 drills (out of 10!)
Slow progress but am getting there. In fact last week I finished 4 drills but at a very low intensity - mostly getting comfortable with the steps. I still get belly aches when I do those plyo jumps and my feet (arch) start burning and hurting.
Even if it takes me 5 years to master all 10 drills, I plan to keep trying until I do the entire workout in one session. Because I think that workout is fun, I just need to get a little fitter than I am. That's all.
The Interval Max workouts are hard but they are fun and burn (I think) maximum calories. I look forward to doing them everytime and since last month try to do them once a week (I don't follow any rotations routines).
Trust me - getting that particular workout was NOT a mistake. You may not be able to do them right away but in time, you will.
Back when I started, someone (I think it was Cathe) had recommended that I start with her MIC (start with floor and step up to the step workout) since I was not used to Cathe's style. However, Body Max was the first workout I mastered and loved it and still do.
Depending on your fitness level, you might want to try MIC which
have simpler and easier workouts. Or, you can step without the step. I do that too on light days.
Slow and steady - always wins!