Shake-Up is just a difficulty Level III workout but as a fascial fitness challenge that also works hip tendons, both front and side, it is unparalleled. Stay on the balls of your feet while doing Jumping Jacks and bring your hands down fast, by your side, and try and max out the reps each time. Add EC and you have a VO2 Max challenge on top of everything else.
Extra Credit: 1 minute rest between sets.