To torch more calories than running a six-minute mile, you couldcross-country skiuphill at a crazy-fast clip.
Each energizing exercise in this mix sheds and sculpts, remaking your shape.
The trainer:Russian-born Dasha Libin (her grandfather taught kettlebells to the Soviet army!

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), co-owner of Anderson Martial Arts in New York City, created this clever Kettlebell Kickboxing combo.
You’ll need:A 10- to 15-pound kettlebell ($30 and up;GoFit.net).
The plan:Warm up for five minutes (shadowbox,jump ropeyou decide).

Then do each three-move round, performing every exercise for one minute.
Take a one-minute breather between rounds.
Try the sizzle session three times a week on nonconsecutive days.

Rotate torso to left as you bring left knee toward right elbow.
Repeat quickly on opposite side.
Continue for 1 minute.

Reverse movement to return to start.
Continue for 1 minute.
Lunge right leg back then stand, kicking right leg forward.

Continue for 30 seconds.
Switch sides; repeat.
Switch sides; repeat.

Continue, alternating sides, for 1 minute.
Lift left heel off floor, then squat.
Switch sides; repeat.

Continue, alternating sides, for 1 minute.
Lunge back with right leg.
Stand, bringing right thigh parallel to floor.

Bend forward, lowering arms toward floor, extending right leg behind you until parallel to floor.
Switch sides; repeat.
Continue, alternating sides, for 1 minute.

Hold plank as you extend left foot to right side at a 45-degree angle.
Switch sides; repeat.
Continue, alternating sides, for 1 minute.

Continue for 1 minute.
Step right leg back and to left, then explode upward, swinging leg in a circle.
Switch sides; repeat.
Continue, alternating sides, for 1 minute.