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Barbell Ab Rollout - On Knees

The Barbell Ab Rollout - On Knees primarily targets your Abdominals, with support from Lower Back, Shoulders. It requires barbell and is best suited to expert lifters.

Expert level · Equipment: Barbell · Compound · Pull

Primary muscles: Abdominals Secondary muscles: Lower Back, Shoulders

How to perform Barbell Ab Rollout - On Knees

  1. Step 1. Hold an Olympic barbell loaded with 5-10lbs on each side and kneel on the floor.
  2. Step 2. Now place the barbell on the floor in front of you so that you are on all your hands and knees (as in a kneeling push up position). This will be your starting position.
  3. Step 3. Slowly roll the barbell straight forward, stretching your body into a straight position. Tip: Go down as far as you can without touching the floor with your body. Breathe in during this portion of the movement.
  4. Step 4. After a second pause at the stretched position, start pulling yourself back to the starting position as you breathe out. Tip: Go slowly and keep your abs tight at all times.

Frequently asked questions

Which muscles does the barbell ab rollout primarily target?

The movement primarily targets the rectus abdominis and transverse abdominis. It functions as an anti-extension exercise, requiring the core to stabilize the spine against gravity.

What is a common form mistake to avoid during the rollout?

The most frequent error is allowing the lower back to arch or sag toward the floor. Maintain a slight posterior pelvic tilt and keep the glutes engaged to protect the lumbar spine.

How can beginners make the barbell rollout more manageable?

Beginners should limit the range of motion by rolling out toward a wall that acts as a physical stop. This prevents overextension while strength is being developed.

What is the ideal set and rep range for this exercise?

Perform 2 to 4 sets of 8 to 12 controlled repetitions. Focus on a slow eccentric phase rather than high volume to ensure maximum tension on the abdominal wall.

How should I position my arms and shoulders during the movement?

Keep the arms straight with a slight bend in the elbows and protract the shoulder blades. Avoid pulling back with the arms; instead, use the core to pull the torso back to the start.

Sample sets & reps for Barbell Ab Rollout - On Knees

  • Strength accessory: 4 sets × 6-8 reps, 90s rest. 75-80% 1RM, RPE 7-8.
  • Hypertrophy: 3-4 sets × 8-12 reps, 60-90s rest. RPE 8, controlled tempo.
  • Metabolic stress: 3 sets × 15-20 reps, 30-45s rest. RPE 9, last set to failure with rest-pause.

Pick the scheme that matches your goal. Beginners should start at the lower end of every range; progress weight only when you hit the upper end of the rep range with one or two reps in reserve.

Related Abdominals exercises

  • 3/4 Sit-Up — bodyweight
  • Ab Crunch Machine — machine
  • Ab Roller — other
  • Advanced Kettlebell Windmill — kettlebell
  • Air Bike — bodyweight

See all Abdominals exercises →

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