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Crunches

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Crunches. It primarily works the rectus abdominis muscle. Crunches—sometimes called "ab curls"— may also engage the external or internal oblique muscles.

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The basic crunch is the consummate abdominal exercise in a strength-training program. Working at Crunch is more than a job, it's an opportunity to inspire others to reach their fitness goals. It primarily works the rectus abdominis muscle.

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The crunch is one of the most popular abdominal exercises. The basic crunch is the consummate abdominal exercise in a strength-training program. Crunch definition is - to chew or press with a crushing noise.