Core · Bodyweight
Open and Knee Tuck on a Padded Stool
How to do the open and knee tuck 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
- Intermediate
- Logged as
- Reps
- Movement
- Flexion
- Mechanic
- Compound
How to do it
Set your hands on a padded stool in a plank with your body straight. Jump both feet forward into a tuck toward your chest, then jump them back and out wide, alternating the tuck and open positions while bracing your core.
- 1Your abs pulling the knees in on each tuck
- 2Shoulders and arms bracing against the stool
- 3Core controlling the hips as the legs move
Common mistakes
- Letting the hips shoot up on the tuck
- Sagging the lower back in the plank
- Landing heavy instead of staying controlled
Muscles worked
The open and knee tuck on a padded stool mainly works the lower abs, upper abs, and hip flexors, with the obliques, quads, glutes, and front delts assisting.
- Lower AbsPrimary
- Upper AbsPrimary
- Hip FlexorsPrimary
- ObliquesSupport
- QuadsSupport
- GlutesSupport
- Front DeltsSupport
- TricepsMinor
- ForearmsMinor
- Mid ChestMinor
- Upper TrapsMinor
- HamstringsMinor
- CalvesMinor
- AdductorsMinor
Kovo programs the open and knee tuck 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.