Oblique Crunch

A side-focused crunch that curls the upper torso toward the hip, emphasizing the oblique abdominal muscles.

How to do the Oblique Crunch#

  1. Lie on your back with knees bent and feet flat; place your hands lightly behind your head or across your chest.
  2. Rotate your torso and lift one shoulder blade toward the opposite hip by contracting the oblique on that side.
  3. Exhale as you curl upward, keeping the motion controlled and your lower back in contact with the floor.
  4. Inhale and slowly lower the shoulder blade back down until it nearly touches the floor.
  5. Repeat for the desired reps, then switch sides.

Muscles worked#

  • Primary: Obliques (External & Internal Obliques)
  • Secondary: Abs (Rectus Abdominis)

Common mistakes#

Track the Oblique Crunch in Gript: your previous sets in view while you train, records detected automatically, and an estimated 1RM chart from every hard set.

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Frequently asked questions#

What muscles does the Oblique Crunch work?

The Oblique Crunch primarily works the obliques. The abs assist as secondary muscles — they stabilise the movement and take over when the main target fatigues. If you feel it mostly in the abs, lighten the load and slow the lowering phase.

What equipment do I need for the Oblique Crunch?

None. The Oblique Crunch is a bodyweight exercise, so all you need is enough space to move through the full range of motion.

Is the Oblique Crunch suitable for beginners?

Yes. The Oblique Crunch is rated beginner: the technique is quick to pick up and forgiving when a rep goes slightly off. Start light and add weight once the form repeats itself without you thinking about it.

What are good alternatives to the Oblique Crunch?

Air Bike, Bicycle Crunch, Bicycle Crunch Raised Legs all train the same primary muscles as the Oblique Crunch. Pick whichever one matches the equipment in front of you.