Skip to main content
Exercises / Isolation Beginner

Exercise demo

Cable crunch

The cable crunch loads the rectus abdominis without compressing the lower back the way a sit-up does. It is the cleanest loaded ab lift you can do if you do not fancy lying on a mat in a busy gym.

Primary muscle

Abs

Equipment

Cable

Force

Pull

Mechanics

Isolation

Setup

Attach a rope to a high cable. Kneel a foot back from the stack so the cable runs at roughly a 30 degree angle to vertical. Hold a rope end in each hand and bring the rope down to either side of your face, knuckles in. Brace the abs before the first rep and keep that brace the whole set.

How to do it

  1. 1

    Anchor the hips

    Sit back onto your heels so the hips do not move during the rep. Movement happens at the spine, not the hips. If your hips swing, the load is going into the hip flexors not the abs.

  2. 2

    Curl the ribcage down

    Pull the ribcage toward the pelvis, rounding the upper back, not folding at the hips. Aim to bring the elbows toward the thighs. Exhale on the way down to fully empty the trunk.

  3. 3

    Pause at the bottom

    Hold the squeezed position for one count. This is the half of the rep most lifters skip and the half that actually builds the abs.

  4. 4

    Return under control

    Reverse the curl slowly. Resist the cable on the way up. The eccentric is where the muscle does most of its work; do not let it snap back to the start.

Common mistakes

  • Hinging at the hips instead of rounding the spine, which turns the lift into a kneeling row.
  • Pulling with the arms, which works the lats but ignores the abs.
  • Letting the cable yank you back at the top, losing the eccentric.
  • Loading the stack too heavy, which forces the hips to swing.
  • Holding the breath. Exhale on the curl down to squeeze the abs harder.

Variations

Decline crunch

Bodyweight version on a decline bench. No cable needed. A clean home or hotel-gym alternative.

See the decline crunch page →

Standing cable crunch

Same lift, performed standing with a rope at face height. Useful if kneeling bothers your knees. Slightly less spinal flexion, slightly more anti-extension.

Dumbbell crunch

Hold a dumbbell across the chest and crunch from the floor. Lower-volume option for home training.

FAQ

How much weight should I use on the cable crunch? +
Pick a weight that lets you reach a strong contraction by rep 10 to 12 with no hip movement. Most adults sit between 20 and 40 percent of the full stack. If the stack is moving you off the floor, you are too heavy.
How many sets and reps? +
Three working sets of 10 to 15 reps with two to three minutes rest. The abs respond to volume more than load. Two to three trunk sessions per week is plenty for most lifters past 40.
Will the cable crunch give me a six pack? +
Strengthening the abs and seeing the abs are separate problems. The cable crunch builds the muscle. Whether it shows depends on body-fat percentage, which is downstream of food intake and overall training volume, not crunch volume.
Is the cable crunch safe with a stiff lower back? +
It is usually fine because the spine flexes through a small, controlled range and the load is light. If even a few reps light up the back, swap to a dead-bug or a hollow hold and rebuild trunk endurance before coming back. Sharp pain is a signal to step back. Do not lift through it.
Why does my neck hurt during the cable crunch? +
The rope is too low or you are leading with the chin. Keep the rope at face level and lead with the ribcage, not the head. Your eyes should stay on the floor through the rep.

Free tool

Plan the next set on cable crunch

Enter your last set, get the next working weight tuned for steady, joint-friendly progress.

Open the calculator →

Track cable crunch in STRNTH

STRNTH logs every set, applies progressive overload automatically and schedules deload weeks before fatigue catches up with you. Free to download.