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Fast-paced and super-challenging, it's an ever-changing mix of non-stop cardio combos. You're sure to burn fat, build stamina … and test your endurance. Don't even think about slowing down; these wide-ranging moves only change from “fast” to “even faster” (in the “power up” intervals that end each combination). The exercises include pivots, repeaters and directional changes plus higher-impact ski jumps, power leaps and football-style plyo drills (the last combo is nearly all high-impact, but one person shows an easier variation). Throughout, Amy's cuing and transitions are flawless while her energy level is amazing. Includes some “pre-mixed” workout options. ©2006.