Abs · Exercise ball
Stability Ball Crunch
The stability ball crunch is an isolated core exercise targeting the rectus abdominis through an extended range of motion compared to standard floor crunches. It suits lifters of all experience levels and fits best toward the end of a workout as a dedicated abdominal and stabilizer movement.
- Muscles
- Abs
- Equipment
- Exercise ball
- Type
- Strength
- Animation
- Men and women
How to do it
- Lie with your lower back supported on a stability ball, feet flat on the floor.
- Place your hands behind your head or across your chest.
- Keep your core engaged and maintain balance on the ball.
- Crunch up by contracting your abdominal muscles, lifting your shoulders.
- Slowly return to the starting position, maintaining control throughout.
Common mistakes
- Pulling behind the head places excessive stress on the cervical spine and reduces core activation.
- Rolling the ball with the hips creates momentum, which removes continuous tension from the abs.
- Hyperextending the lower back too far over the ball can cause lumbar strain and a loss of balance.
Tips
- Keep your feet planted flat on the floor at shoulder width to maintain a steady base of support.
- Pause for a full second at the top of the crunch to maximize peak abdominal contraction.
- Lower yourself slowly over the curve of the ball without relaxing your core muscles completely.
Sets and reps
Perform 3 to 4 sets of 15 to 20 controlled repetitions with 45 to 60 seconds of rest between sets to build core endurance and muscle definition.
Muscles worked
Your coach guides every set
Turn on the coach in Gloox: it asks how you feel, picks the weight from your history and cues technique and rest. Rate each set and the next one is tuned to you.
On a computer? Point your phone's camera here to get the app.
Questions
Why do crunches on a stability ball instead of the floor?
The curvature of the ball allows your spine to extend slightly past neutral, resulting in a larger range of motion and greater muscle recruitment.
Is this exercise safe if you have lower back sensitivity?
The ball provides supportive cushioning for the lumbar spine, but if you experience any sharp pain or discomfort, stop immediately and consult a healthcare professional.
