Core · Bodyweight
Knee Tuck Oblique Crunch
How to do the knee tuck oblique crunch, the muscles it works, and the mistakes to avoid. Pulled straight from the Kovo app's exercise library.
- Equipment
- Bodyweight
- Difficulty
- Beginner
- Logged as
- Reps
- Movement
- Flexion
- Mechanic
- Isolation
How to do it
Lie on your back with your hands lightly behind your head. Crunch your torso up while simultaneously tucking your knees toward your chest, twisting so an elbow meets the opposite knee. Lower under control and alternate sides each rep.
- 1Feel your obliques squeeze as elbow and opposite knee meet
- 2Drive the crunch from your abs, not your neck
- 3Keep tension through your midsection the whole rep
Common mistakes
- Don't yank on your head or neck with your hands
- Avoid swinging your legs; move with control
- Don't let your lower back arch off the floor
Muscles worked
The knee tuck oblique crunch mainly works the upper abs, lower abs, and obliques, with the hip flexors assisting.
- Upper AbsPrimary
- Lower AbsPrimary
- ObliquesPrimary
- Hip FlexorsSupport
- QuadsMinor
Kovo programs the knee tuck oblique 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.