Quads, calves, glutes and hamstrings take quite a pounding in the Hot Mess workout and that's before the core, and lateral abs exercises kick in and shoulders get worked. This is a high burn workout that despite it being Level III in terms of difficulty, will certainly get you in the sweat zone faster than you expect and then keep you there. Add EC and the challenge to your VO2 Max is intensified.
Extra Credit: 1 minute rest between sets.