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Exercise Ball Crunch

The Exercise Ball Crunch primarily targets your Abdominals. It requires ball and is best suited to beginner lifters.

Beginner level · Equipment: Ball · Isolation · Pull

Primary muscles: Abdominals

How to perform Exercise Ball Crunch

  1. Step 1. Lie on an exercise ball with your lower back curvature pressed against the spherical surface of the ball. Your feet should be bent at the knee and pressed firmly against the floor. The upper torso should be hanging off the top of the ball. The arms should either be kept alongside the body or crossed on top of your chest as these positions avoid neck strains (as opposed to the hands behind the back of the head position).
  2. Step 2. Lower your torso into a stretch position keeping the neck stationary at all times. This will be your starting position.
  3. Step 3. With the hips stationary, flex the waist by contracting the abdominals and curl the shoulders and trunk upward until you feel a nice contraction on your abdominals. The arms should simply slide up the side of your legs if you have them at the side or just stay on top of your chest if you have them crossed. The lower back should always stay in contact with the ball. Exhale as you perform this movement and hold the contraction for a second.
  4. Step 4. As you inhale, go back to the starting position.
  5. Step 5. Repeat for the recommended amount of repetitions.

Frequently asked questions

What is the correct positioning for an exercise ball crunch?

Sit on the ball and walk your feet forward until your lower back is supported by the curve. Keep your feet flat on the floor at hip-width for stability.

Which muscles are primarily targeted during this movement?

The exercise ball crunch specifically targets the rectus abdominis. The unstable surface requires additional engagement from the deep core stabilizers to maintain balance.

What are common form mistakes to avoid?

Avoid pulling on your neck with your hands or using momentum to bounce off the ball. Ensure the movement is driven by rib-to-pelvis contraction rather than hip flexion.

How can beginners make the exercise ball crunch easier?

Beginners can increase stability by widening their foot stance or placing the ball closer to a wall. Reducing the range of motion until core strength improves is also effective.

What is the recommended set and rep range for hypertrophy?

Perform 3 to 4 sets of 12 to 20 controlled repetitions. Focus on a slow eccentric phase and a peak contraction at the top of each movement.

Sample sets & reps for Exercise Ball Crunch

  • Beginner endurance: 3 sets × 8-12 reps, 60-90s rest. RPE 6-7, leave 3 reps in reserve.
  • Hypertrophy: 4 sets × 12-20 reps, 60s rest. RPE 8, last set to failure.
  • Conditioning: 3-5 sets × AMRAP for 30-45s, 30-60s rest. Steady pace, controlled tempo.

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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