I read about this on SparkPeople (see Fitness Articles, Focused Fitness) and it's a 4-minute workout, although they suggest an 8-10 minute warmup. I'm going to try it tomorrow and see what I think. They recommend you can use it for 1-2 cardio sessions each week, and no more.
It's 20 second as hard as you can go (90-95% of your max heart rate) at whatever you're doing - swimming, running, biking, etc. - then 10 seconds of slower rate; repeat 8 times. Hence, 4 minutes. With the warmup part, that's a 15-minute workout.
I'm sure there are variations on Tabata, but I got the impression that the idea was a faster workout, but only 1-2 times weekly if you're doing 5 days a week cardio. Doesn't sound the same as what everybody is discussing here.
| Pounds lost: 2.5