The weighted suitcase crunch is a weighted version of a popular abdominal training exercise. The simple addition of a weight makes the suitcase crunch far more difficult, helping build the "six pack" muscles and providing a different stimulus to the core during training.
Allows you to train in lower rep ranges when bodyweight crunches become too easy
Weighted ab training can help the core muscles grow and look more defined
Increases abdominal strength, not just muscle definition