HIIT

Does anyone know anything about HIIT? I'm going to embark on a bit of research about it, including adding it to my workouts. The worst that will happen (short of a coronary incident) is that I won't lose more weight. I'm not going to stop doing my 30 minute Wii Fit habit, but will alternate HIIT a few days a week.

Off to the library to see what's available.