I tore my quad about a month and a half ago, so I can weight train, but I can't really do any HIIT yet. I used to do HIIT for sports and just as cardio as well. One of my friends, a cheerleader at the school (a female one ;) ), is going to take me through one of her cardio routines, she does competitive running, marathons, etc. so it should be a pretty good workout.

I like the link, Underground Body Opus and Power Eating sparked my interest.