i do something similar to that in the mornings and after some workouts....except im only at like a 4 or 5 inch incline...at 4 or 5 mph but if that aint enough i will up it like the way you suggested.....from what i understand about HIIT is that you dont have to do it as long(say 15 mins opposed to 30) and you burn the same amount if not more than doing reg cardio....the whole point behind HIIT is that it speeds up your resting metabolism as well....thats just what ive read...and in all honesty ive pretty much slowed down on the HIIT cardio but if im low on time i will do it...i guess it is all just based on your goals.....i can pack on weight like its nothing it just getting off that is the hard part for me....like ive said to people at the gym im so fed up im ALMOST willing to loose some muscle just to loose insane amounts of bf.....but since im on cycle im going to keep doing my normal cardio and throw in HIIT a few times during the week and let my diet and the tren and test do the rest of the work...along with lifting of course....ill up the incline tonight and see how i feel....its not much of a diff but if its that extra inch that is going to get me there im all for it.