Core · Bodyweight
Sitting Frog Crunch on a Padded Stool
How to do the sitting frog crunch on a padded stool, the muscles it works, and the mistakes to avoid. Pulled straight from the Kovo app's exercise library.
- Equipment
- Bodyweight
- Difficulty
- Beginner
- Logged as
- Weighted reps
- Movement
- Flexion
- Mechanic
- Isolation
How to do it
Sit on the edge of a padded stool and lean your torso back slightly while gripping the sides for support. Bring the soles of your feet together and let your knees fall open in a frog position, then crunch your torso and knees toward each other by contracting your abs. Extend back out under control and repeat.
- 1Your abs contracting to draw your chest and knees together
- 2A strong squeeze through the front of your core at the top
- 3Controlled extension as you lower back without fully relaxing
Common mistakes
- Don't yank with your hip flexors; lead the crunch with your abs
- Avoid swinging your legs with momentum
- Don't round forward from your neck; keep the work in your core
Muscles worked
The sitting frog crunch on a padded stool mainly works the upper abs and lower abs, with the hip flexors and obliques assisting.
- Upper AbsPrimary
- Lower AbsPrimary
- Hip FlexorsSupport
- ObliquesSupport
- QuadsMinor
Kovo programs the sitting frog crunch on a padded stool 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.