I normally tack on cardio after STS for about 30 minutes. I need a little extra cardio to stay lean. So lately i haven't been able to workout for more than one hour due to other life obligations. So i decided to put a little twist on meso 2 today. I preset my treadmill at 6mph and 10% incline and during the one minute break after each set, i jumped on the treadmill to get the cardio factor. It was an amazing workout!!!!! I was spent by the end of the workout. I think i may do all of meso 2 like this. Just wanted to share.