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A super-tough, total-body program that uses two heavy kettlebells (but most exercises can be done with just one bell). The fast pace burns calories while the heavy weight levels totally challenge every muscle (like the original “Russian-style” exercises). You get three 19 to 20-minute aero/tone interval segments. Each one features three combos — about one minute of aerobics and five minutes of toning. The cardio ranges from kettlebell jump squats to non-bell jacks. But it's the exceptionally varied toning that's truly intense (e.g. multiple overhead swings, push-ups on the bells, parallel bar-type “levitations”). Superb, one-on-one, cue-ahead instruction. Requires one or two heavy kettlebells (Amy's are 20 lb.). Uses lots of floor space. ©2009.