Yeah, after I posted that I read up some more on some of your HIIT routines, I think I'll just try the beginner routine, and if I can't sprint for a whole minute I'll just go as long as I can and work my way up to a minute. I also got to thinking about when I could actually do it, and there's really only one day a week that I could even manage to go in the morning and evening... so I'll do it 2x on Sundays, but only once on the other days, in the evenings... I could manage to walk on the treadmill for a few minutes on the other mornings though... which isn't much, but at least it's something.