Core · Bodyweight
Oblique Crunches Floor
How to do the oblique crunches floor, 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
- Rotation
- Mechanic
- Isolation
How to do it
Lie on your back with your knees bent and feet flat, hands by your head. Curl up and across, bringing one shoulder toward the opposite knee to engage the side of your waist, then lower under control and alternate sides.
- 1The side of your waist working as you twist your shoulder across
- 2Your lower back staying in contact with the floor
- 3A deliberate crunch and twist rather than a yank with the arms
Common mistakes
- Do not pull on your head or neck to lift up
- Avoid using momentum to swing into the twist
- Do not flatten the rotation into a straight crunch
Muscles worked
The oblique crunches floor mainly works the obliques, with the upper abs and lower abs assisting.
- ObliquesPrimary
- Upper AbsSupport
- Lower AbsSupport
- Hip FlexorsMinor
Kovo programs the oblique crunches floor 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.