Today's Insane TOTAL BODY HIIT Workout includes 2-Minutes of Upper Body, 2-Minutes of Lower Body, then 2-Minutes of core. Derick guides you through a quick warm up before you start sweating! This weighted HIIT workout will use dumbbell resistance, body-weight exercises and cardio moves and treadmill drills to burn calories and build lean muscle. C'mon, C'mon, C'mon....let's do this Shredfam!