Core · Bodyweight

Leg Raise Oblique Crunch

How to do the leg raise oblique crunch, the muscles it works, and the mistakes to avoid. Pulled straight from the Kovo app's exercise library.

Animated demonstration of the Leg Raise Oblique Crunch
Equipment
Bodyweight
Difficulty
Beginner
Logged as
Reps
Movement
Flexion
Mechanic
Isolation

How to do it

Lie on your back with your hands behind your head and legs extended. Crunch your torso up while drawing your knees in, twisting one elbow toward the opposite knee to hit your obliques, then lower and alternate sides.

  1. 1Your obliques and lower abs working together to crunch and twist
  2. 2A tight squeeze through the side of your waist at the top
  3. 3Your lower back staying pressed into the floor

Common mistakes

  • Pulling on your head or neck with your hands
  • Using momentum or swinging your legs
  • Letting your lower back arch off the floor

Muscles worked

The leg raise oblique crunch mainly works the upper abs, lower abs, and obliques, with the hip flexors assisting.

  • Upper AbsPrimary
  • Lower AbsPrimary
  • ObliquesPrimary
  • Hip FlexorsSupport
  • QuadsMinor

Kovo programs the leg raise oblique crunch 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.

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Last reviewed June 2026.