The bench barbell roll-out is a challenging exercise targeting the abdominals. It is similar to using an ab roller, but using a barbell allows for a wider grip. Placing the knees on a bench rather than the floor makes the move more difficult by increasing the challenge to the upper body.
Works the ab muscles, including the deep core and the rectus abdominis or "six-pack" muscles
Also hammers the upper back and lats
Can be the only core movement you need in a workout