How to do the Frog Crunch
Frog Crunch is a beginner single-joint isolation pushing exercise targeting the Abs in the Waist region. Performed using bodyweight, it falls under the cardio category. Secondary muscles engaged include Hip Flexors.
Frog Crunch demonstration · © GymiaFit
Frog Crunch at a glance
- Primary muscles
- Abs
- Secondary muscles
- Hip Flexors
- Equipment
- Body Weight
- Level
- Beginner
- Type
- Isolation (single-joint)
- Force
- Push
Frog Crunch step by step
- 1Lie flat on your back with your knees bent and feet flat on the ground.
- 2Place your hands behind your head with your elbows pointing outwards.
- 3Engaging your abs, lift your upper body off the ground, curling forward until your torso is at a 45-degree angle.
- 4Pause for a moment at the top, then slowly lower your upper body back down to the starting position.
- 5Repeat for the desired number of repetitions.
Frog Crunch — questions
What muscles does the Frog Crunch work?
The Frog Crunch primarily targets the Abs. It also recruits the Hip Flexors as secondary movers.
What equipment do I need for the Frog Crunch?
None — the Frog Crunch uses your bodyweight only, so it works at home with nothing but floor space.
Is the Frog Crunch suitable for beginners?
Yes. It is classed as a beginner movement: the pattern is simple enough to learn in a session and easy to scale by adjusting range of motion or load.
What can I do instead of the Frog Crunch?
3/4 Sit-up, 45° Side Bend, Air Bike train the same muscles and make good substitutes when the equipment is taken or the movement does not suit you.
Log it, don't guess it.
The GymiaFit app has the Frog Crunch demo, form cues and set logging built in — plus a muscle map that shows what you have actually trained this week. Free on iOS and Android.