Hedge, what do you (and the other guys also) think about Max-OT Cardio??? 16 minutes, of hard, intense trainning normally with some resistance (bike, eliptical)
In general, very good.
My favorite is the Tabata protocol, which has work of 20 secs with 10 sec rest, also 8 intervals.
Ie, you're done inside of 4 minutes.
It makes the workout extremely intense.
You could try different "in-betweens" as well, such as 40 secs of work, 20 sec resting, or 30-15.
For awhile, I started off a cardio workout 3 one minute intervals, Max-OT style, and after the 3rd minute resting, I finished off with the Tabata protocol, but only 5 or 6 intervals.
The message is to play around some, I did it mainly because I feel Max-OT can be pretty boring, and lacks some intensity.
You work for one whole minute after all.
So check the Tabata Protocol, but if you enjoy the Max-OT, it's great.
Try the Tabata on a stationary or a recumbent though. You'll love it.
Another thing: I use low resistance and high cadence, to target the cardiovascular training and avoid training legs.
-Hedge