An aero/tone “interval” workout that varies the exercises, but not the intensity — this super-tough program just never slows down. Cathe has added extra variety to her usual repertoire; she's included functional fitness, agility training and balance routines. You get six circuits, each with three segments — step aerobics, standing toning and floorwork. The cardio ranges from classic step to leaping moves to football drills (many need a large floor area but Cathe won't let you slack off “not enough space, then take it higher!”). The toning has lots of equipment and movement variety, from pulsing squats and “dive bomber” push-ups to “fire walkers” and against-the-wall stability ball routines. Includes shorter “premixed” workouts. Some vocal music. Requires 3 to 15 lb. dumbbells, a barbell, stability ball and a 6-foot resistance band. ©2006.