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Waist Exercise · Body Weight

Frog Crunch exercise animation

Frog Crunch

Category
Waist
Equipment
Body Weight
Target
Abs

Bringing the knees out wide like a frog while crunching shifts some emphasis onto the hip flexors and inner thighs alongside the abs, compared to a standard crunch with the knees together. It's a variation worth rotating in for the different hip angle rather than a wholesale replacement for straight crunches.

How to Do the Frog Crunch

  1. Lie on your back with your knees bent and your feet flat on the floor.
  2. Rest your hands behind your head with elbows pointed outward.
  3. Contract your abs to curl your upper body up off the floor until your torso reaches about a 45-degree angle.
  4. Pause momentarily at the top, then lower your upper body back down slowly.
  5. Complete your planned set count, emphasizing full range of motion and strong peak contraction in the abs.

Calorie Burn & Set Tracker

Sets
3
Reps / Set
10
Active Timer
00:00
Estimated Burn
0 kcal

Muscles Worked

The Frog Crunch primarily targets the Abs, with Hip Flexors as the primary synergist muscle group.

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Equipment Alternatives

Don't have body weight? These target the same abs with different equipment.

Assisted Hanging Knee Raise Assisted Hanging Knee Raise Assisted · Abs Assisted Motion Russian Twist Assisted Motion Russian Twist Medicine Ball · Abs Band Alternating V-Up Band Alternating V-Up Band · Abs Barbell Press Sit-Up Barbell Press Sit-Up Barbell · Abs

FAQ

What muscles does the Frog Crunch work?
The Frog Crunch primarily targets the abs, with the hip flexors as the main supporting muscle group.
What equipment do I need for the Frog Crunch?
The Frog Crunch is done with no equipment — just body weight.
What's a good alternative to the Frog Crunch?
If you don't have access to the space or setup it needs, the Assisted Hanging Knee Raise targets the same abs using assisted instead.