What does a crunch improve?

Like situps, crunches help you build muscle . But unlike situps, they work only the abdominal muscles. This intense muscle isolation makes them a popular exercise for people trying to get six-pack abs. This also makes them ideal for strengthening your core, which includes your lower back muscles and obliques.

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Why do crunches decline?

Doing crunches on a decline bench forces your abs to work extra hard in raising your torso, leading to more strength, stability, and athleticism . We recommend including the decline crunch near the end of your traditional workouts or as one of the first exercises in an ab routine.

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