Just recently received the INSANITY workouts. I've completed two 3 month STS rotations and am on the last week of an undulating rotation. Planning on starting INSANITY next week. Has anyone stuck strickly to the INSANITY rotation without adding weights or changing anything and what kind of results did you get? I'm feeling weird about 2 months with no weights, however I did get the upgraded INSANITY that includes and upper body weighted workout. But dont know how or where to add that in. I've made good muscle gains with STS and don't want to lose that, but I am also wanting to tighten and tone up more and from what i"ve seen INSANITY will deliver that.