Core · Bosu Ball
Crunch on BOSU Ball
How to do the crunch on bosu ball, the muscles it works, and the mistakes to avoid. Pulled straight from the Kovo app's exercise library.
- Equipment
- Bosu Ball
- Difficulty
- Advanced
- Logged as
- Weighted reps
- Movement
- Flexion
- Mechanic
- Isolation
How to do it
Sit on a Bosu ball and walk your feet out so your lower back curves over the dome. Place your hands lightly by your head and crunch up by drawing your rib cage toward your pelvis, using the dome for a deeper stretch at the bottom. Lower under control until you feel the abs lengthen over the ball.
- 1A strong contraction through the entire abdominal wall
- 2The extra stretch the dome adds at the bottom
- 3The crunch coming from the abs, not the neck or arms
Common mistakes
- Pulling on the head and neck with the hands
- Using the hip flexors to yank yourself up
- Jerky reps or bouncing off the ball
Muscles worked
The crunch on bosu ball mainly works the upper abs and lower abs, with the obliques assisting.
- Upper AbsPrimary
- Lower AbsPrimary
- ObliquesSupport
- QuadsMinor
Kovo programs the crunch on bosu ball for you and tracks it every session.
We build your whole program, drop the right lifts into each workout, and adjust your weights as you get stronger. Free on iOS and Android.
More abs & core exercises
- How to do the ab wheel rollout
- How to do the ankle tap plank
- How to do the ankle taps
- How to do the resistance band dead bugs
- How to do the resistance band pallof press
- How to do the rollout
Last reviewed June 2026.