The barbell rollout from bench is an exercise that targets the abdominal muscles, particularly the rectus abdominis or six-pack muscles. It is performed by lying on a bench with your knees bent and your feet flat on the floor A barbell is then placed across your lower back, just above your hips. You then roll the barbell out in front of you until your arms are straight, then slowly roll it back in. This exercise can be performed for a number of repetitions, or as a hold. It is a challenging exercise, but it is also very effective for building strength and definition in the abdominal muscles.