Core · Bodyweight
Seated 8 Leg Crunch with Chair
How to do the seated 8 leg crunch with 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 chair and lean back slightly, holding the sides for support. Extend your legs out, then crunch your knees toward your chest while curling your torso down to meet them, squeezing the abs hard at the top before extending back out.
- 1Abs crunching the ribcage toward the hips
- 2Knees and chest drawing together at the peak
- 3Continuous tension with feet kept off the floor
Common mistakes
- Using leg swing to power the crunch
- Letting the feet touch down between reps
- Pulling with the neck instead of the abs
Muscles worked
The seated 8 leg crunch with chair mainly works the lower abs and upper abs, with the hip flexors and obliques assisting.
- Lower AbsPrimary
- Upper AbsPrimary
- Hip FlexorsSupport
- ObliquesSupport
- QuadsMinor
Kovo programs the seated 8 leg crunch with 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.