Exercise guide
Sit Up On Stability Ball
- Beginner
- Compound
- Rep-based
- Waist
This exercise targets the rectus abdominis and obliques by utilizing the ball's curvature to increase the range of motion and challenge core stability. It provides a deeper stretch and more intense contraction compared to traditional floor sit-ups.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Sit on the stability ball with your feet flat on the floor, hip-width apart.
- Walk your feet forward slowly while leaning back until the ball is positioned under your lower back and mid-back.
- Place your hands lightly behind your head with elbows wide, or cross them over your chest.
- Position your body so your thighs and torso are roughly parallel to the floor.
How to do it
- Exhale and contract your abdominals to curl your upper body toward your knees, lifting your shoulder blades off the ball.
- Pause at the top of the movement for one second to emphasize the peak contraction.
- Inhale and slowly lower your torso back down over the curve of the ball, returning to the starting position.
- Maintain a controlled 2-1-2 tempo (2 seconds down, 1 second pause, 2 seconds up).
Form checklist
- Keep your chin tucked slightly toward your chest to avoid neck strain.
- Ensure the movement comes from your core, not by pulling on your head with your hands.
- Keep your feet firmly planted and your glutes engaged to stabilize the ball.
- Focus on 'curling' your ribs toward your pelvis rather than just hinging at the hips.
Pro tips
- Take advantage of the ball's shape by allowing your spine to slightly extend over the curve at the bottom for a full abdominal stretch.
- Keep your tongue pressed to the roof of your mouth to help stabilize the deep neck flexors and reduce strain.
Make it harder
- Hold a medicine ball or weight plate against your chest to increase resistance.
- Narrow your stance by bringing your feet together to decrease your base of support and increase the stability demand.
Frequently asked
- What muscles does the sit up on stability ball work?
- The sit up on stability ball primarily targets the abs and obliques, and also works the erector spinae and hip flexors as secondary muscles.
- What equipment do you need for the sit up on stability ball?
- The sit up on stability ball uses stability ball.
- Is the sit up on stability ball good for beginners?
- Yes. The sit up on stability ball is a beginner-friendly movement and a strong foundation to build on.