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This is my favorite abs exercise because you don't tug at your neck like we sometimes do during mat work, and you don't need a lot of reps to get the job done. It works your balance too," says fitness expert Ellen Barrett, star of the "Ellen Barrett Live: POWER FUSION" DVD.
To do it: Stand with your feet planted 3-4 feet apart, toes slightly turned out, hands on your hips. Lower into a plie by bending your knees out over your toes and lowering your hips directly underneath your shoulders. Then, as your straighten back up, slowly lift the right knee up towards the right shoulder. As you go back into the plie, slowly return the foot to the floor. Be sure to move at a very controlled pace to really engage the obliques the entire time—on the way up and on the way down. Do 10 repetitions on the right side, then another 10 repetitions on the left side for a total of 20.
20 top fitness experts reveal their go-to move for a flat, sexy stomach.
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