Pilates · Beginner
Cross-Body Crunch
The cross-body crunch is a floor exercise that works the muscles across your entire midsection, including the ones that run diagonally along your sides. By bringing an elbow toward the opposite knee, you train your core to rotate and stabilize — a motion you use every time you reach across your body, get out of a car, or twist to look behind you. It requires no equipment and can be done at your own pace.
Category
Pilates
Difficulty
Beginner
Equipment
Bodyweight
MET
3.0
Primary muscles
The movement
Form cues
- 01
Lie on your back with your knees bent and feet flat on the floor, about hip-width apart.
- 02
Rest your hands loosely behind your head — fingertips touching, elbows wide — so your hands are not pulling on your neck.
- 03
Before you move, press your lower back gently into the floor and tighten your stomach as if bracing for a light tap.
- 04
Lift your right shoulder blade off the floor and rotate toward your left knee while drawing that left knee in to meet it.
- 05
Lead with your shoulder, not your elbow — the rotation should come from your ribs, not from yanking your head forward.
- 06
Exhale as you crunch up and rotate; breathe in as you lower back down with control.
- 07
Lower your foot back to the floor completely before starting the next rep on the other side.
- 08
Keep your chin off your chest — imagine you're holding a tennis ball under your chin throughout the movement.
Dosage
How long, how many
Sets
3
Reps
8-12
Rest
60 sec
Watch for
Common mistakes
Pulling on the neck — if your neck aches or your elbows are squeezing toward each other, loosen your hands and let your abs do the lifting.
Only moving the elbow across without rotating the shoulder — you'll know this is happening if your upper back stays flat on the floor during the twist.
Rushing through reps — if your feet are bouncing off the floor or you can't feel your abs working, slow down and control each movement.
Holding your breath — if you feel your face tightening or you're dizzy, you're probably not exhaling on the way up.
Letting the lower back arch off the floor — if there's a gap between your back and the floor at the start, tuck your pelvis slightly until that gap closes.
Scale it
Easier and harder variations
Easier
Instead of bringing the knee in, keep both feet flat on the floor and simply rotate one shoulder toward the opposite knee without lifting the leg.
Use this if lifting your leg causes lower back strain or feels unsteady.
Harder
Extend the working leg fully straight as you crunch, so your straight leg hovers a few inches off the floor while you rotate toward it.
Try this once the standard version feels easy and your lower back stays comfortable throughout.
Note
If you have neck or back discomfort, do a seated torso rotation instead: sit upright in a sturdy chair, cross your arms over your chest, and slowly rotate your upper body left and right without leaning.
Use this when getting up and down from the floor is painful or your back or neck needs a break from floor work.
Sources
Form descriptions and cues are sourced from wger (CC-BY-SA 4.0) and the Free Exercise DB (public domain), edited for the 60+ audience. MET value cites Ainsworth BE, et al. 2011 Compendium of Physical Activities. Med Sci Sports Exerc 43(8):1575-1581.
- free-exercise-db · Unlicense / Public Domain
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