Unlike other core moves that can irritate your neck -- we're looking at you, crunches -- this simple, gentle exercise puts you in a tabletop position, and then uses your abdominal muscles to keep you balanced as you slowly move your arms and legs. (Flatten your belly without a single crunch with this super-effective No-Crunch Ab Workout.)
The result: a firm, strong, flat belly without all the strain. And because this is a compound movement, you're also toning your hips, back, and upper body at the same time.
Watch as Pilates expert Erika Bloom demonstrates how to properly perform this exercise.
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