Just barely read about it in the new Muscle & Fitness, its a newly devoloped workout by team of Japanese scientists, well heres a good link http://www.rosstraining.com/articles...intervals.html
all I have to add was that it wiped me out COMPLETELY
!! I did the M&F workout and its just insane how sore I am, I feel great though. Google Tabata and you'll find some good stuff, I totally recommend it.