Skip Nav

How to Do an AbMat Sit-Up in CrossFit

This CrossFit Exercise Works Your Upper and Lower Abs — It Only Takes a Few Reps to Feel It!

As POPSUGAR editors, we independently select and write about stuff we love and think you'll like too. POPSUGAR has affiliate and advertising partnerships so we get revenue from sharing this content and from your purchase.

One of the first exercises I did when I started CrossFit was this move called an AbMat sit-up, named after the mat you place under your lower back for support. I couldn't believe how sore I was for days after, and I only did about 30 reps!

In this variation of a sit-up, your legs are in a butterfly shape, which forces you to use your abs when moving your torso up and down. It is the ultimate ab-strengthening move in CrossFit to help build ab endurance and strength for more advanced ab-centric moves such as knees up and toes to bar.

There are two types of AbMats you can use — a basic one that's rectangular-shaped ($30), and this fancier one that looks like it has legs ($45) which can help protect your lower back from floor burn when you're doing tons of reps. Honestly, you don't even need to use a mat, but it makes it much more comfortable to blast through reps when you have the support under your lower back.

How to Do an AbMat Sit-Up

  • Lie on your back, and open your legs into a butterfly shape with the soles of your feet pressed together and knees out wide. Extend your arms overhead. If you have an AbMat, place it under your lower back for support.
  • Inhale to curl your torso up, and tap the floor in front of your feet.
  • Lower back to the starting position.
  • This counts as one rep.
How to Do an AbMat Sit-Up in CrossFit
basic one that's rectangular-shaped
Buy Now
How to Do an AbMat Sit-Up in CrossFit
fancier one that looks like it has legs
Buy Now
From Our Partners
What Fittest Woman on Earth Tia-Clair Toomey Eats in a Day
Editors Share the Best Home Workout Videos on YouTube
Rocky Horror Dance Workout From Emkfit
How to Stay Motivated to Run When It's Cold and Dark
Gradient Fitness Wobble Board Review
Candice Warner's Pre-SAS Fitness Training Regime
Live Workouts on POPSUGAR Fitness's Instagram, Week of 10/26
20-Minute Total-Body Bodyweight Workout From Kelsey Wells
Best Dumbbell Exercises to Build Muscle
The Best Lululemon Sports Bras For Every Workout
20-Minute Bodyweight Ab Workout by Kelsey Wells
Hannah Corbin's Tips For Peloton Barre Classes
Latest Health & Fitness