The smith machine V-up is a weighted abdominal exercise that involves pressing a weighted bar upward while performing a V-up. Performing it in a Smith machine eliminates the balance challenge of a free weight. It is usually performed for moderate to high reps in the ab-focused portion of a workout.
Allows you to train in lower rep ranges when bodyweight V-ups become too easy
Weighted ab training can help the core muscles grow and look more defined
Increases abdominal strength, not just muscle tone