Core · Bodyweight
Lying Frog Crunch Feet Together
How to do the lying frog crunch feet together, 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 the soles of your feet pressed together and your knees dropped open to the sides in a frog position. Place your hands behind your head or reach toward your feet, then curl your upper back off the floor in a crunch. Squeeze your abs at the top and lower under control.
- 1Feel your upper abs contract as you curl your shoulders off the floor
- 2Keep your knees relaxed open and lower back gently pressed down
- 3Exhale and squeeze at the top of each crunch
Common mistakes
- Don't pull on your neck with your hands
- Avoid using momentum to bounce up
- Don't let your lower back arch off the floor
Muscles worked
The lying frog crunch feet together mainly works the upper abs, with the lower abs and obliques assisting.
- Upper AbsPrimary
- Lower AbsSupport
- ObliquesSupport
- AdductorsMinor
- Hip FlexorsMinor
Kovo programs the lying frog crunch feet together 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.