Double Crunches (and it's regression, Crunches) are a simple movement that are often performed without proper abdominal activation. Use the tips and technique in this tutorial to significantly increase the demand for abdominal strength in the exercise and build a super strong core.

Tutorial (1-10 min)

Beginner

Rotation / Anti-Rotation Compress / Fold

Calisthenics

Core
Abdominals

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Hanging Leg/Knee Raises