Core · Bodyweight
Sitting Knee Tuck on a Chair
How to do the sitting knee tuck on a chair, 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 sturdy chair and grip the sides of the seat for support. Lean back slightly and extend your legs out straight in front of you, then pull both knees in toward your chest by crunching your abs. Extend back out under control and repeat.
- 1Lower abs doing the work as you draw your knees in
- 2A controlled crunch rather than swinging the legs
- 3Hands steadying you while your core moves the legs
Common mistakes
- Using momentum to swing your legs in and out
- Rounding hard through your low back at the bottom
- Holding your breath instead of exhaling as you tuck
Muscles worked
The sitting knee tuck on a chair mainly works the lower abs and hip flexors, with the upper abs, obliques, and quads assisting.
- Lower AbsPrimary
- Hip FlexorsPrimary
- Upper AbsSupport
- ObliquesSupport
- QuadsSupport
- ForearmsMinor
Kovo programs the sitting knee tuck on a chair 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.