Core · Bodyweight
Seated 8 Leg Crunch
How to do the seated 8 leg crunch, 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
- Isolation
How to do it
Sit on the floor or a bench leaning back slightly with your hands behind you for support and your legs extended off the floor. Trace the shape of a figure 8 in the air with your feet, keeping your legs together and your core braced throughout.
- 1The lower abs controlling the legs through the figure-8 path
- 2A braced, still torso while only the legs move
- 3Constant tension with the feet held off the floor
Common mistakes
- Letting your lower back round or your chest collapse
- Dropping your feet to the floor between reps
- Rushing the pattern and losing core control
Muscles worked
The seated 8 leg crunch mainly works the lower abs and hip flexors, with the obliques, upper abs, quads, and adductors assisting.
- Lower AbsPrimary
- Hip FlexorsPrimary
- ObliquesSupport
- Upper AbsSupport
- QuadsSupport
- AdductorsSupport
Kovo programs the seated 8 leg crunch 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.