Cable Crunch

What is the Cable Crunch?

The cable crunch is a kneeling, weighted trunk-flexion movement performed with a rope attachment held behind the head. Because you can add and progressively increase load, it lets you train the abs like any other muscle, with real overload, rather than just adding endless bodyweight reps.

Muscles worked

Primary: Abs

The rectus abdominis is the target, contracting to flex the trunk and pull the ribcage down toward the pelvis against the cable’s resistance.

Stabilizers

The transverse abdominis braces the trunk so the spine curls under control instead of collapsing or hinging at the hips.

How to perform the Cable Crunch

1. Attach a rope to a high pulley, kneel facing the stack, and hold the rope ends beside your temples with your hips set back over your heels.
2. Fix the hips in place first: the cable crunch is spinal flexion around a stationary pelvis, so the hips must not seesaw open and closed.
3. Start with a tall spine under load, then crunch by flexing the spine and driving your elbows down toward your thighs.
4. Round the back segment by segment as if curling into a ball, chasing the crunch with your ribcage rather than yanking with your arms.
5. Squeeze the abs at the bottom of the flexion where your torso is most rounded and the sternum is closest to the pelvis.
6. Reverse under control, letting the stack pull you back up to a tall spine without the hips shooting backward to cheat the weight up.

Suggested working range: 12–20 reps. Default progression: double progression.

Mechanics

A loaded trunk-flexion isolation from a kneeling position: you curl the spine downward, drawing the ribs toward the pelvis, while the hips stay put so the cable resists spinal flexion specifically. The constant tension of the cable and the ability to stack weight make it the most overload-friendly ab exercise.

Form cues

• •Anchor the hips. Think of them as a fixed hinge and curl the spine down around them, rather than folding at the hip and doing a rope-assisted good morning.
• •Pull with your abs, not your arms: keep the elbows and rope fixed by your head so the crunch comes from the trunk.
• •Round the back deliberately as you crunch down and feel the ribs squeeze toward the pelvis at the bottom.

Common mistakes

• •Rocking the hips backward to pull the weight down with a hip hinge instead of flexing the spine.
• •Pulling the rope down with the arms and shoulders while the trunk stays upright and never rounds.
• •Losing the crunch at the bottom by not fully rounding the spine toward the thighs.
• •Sitting the hips too far back so the movement becomes a straight-arm pulldown rather than an ab crunch.

Variations & alternatives

• •Crunch: the unloaded bodyweight version for when no cable is available or for a burnout finisher.
• •Machine crunch: a fixed-path loaded alternative that’s easier to keep the hips out of.
• •Hanging leg raise: a bottom-up flexion movement that biases the lower rectus abdominis instead.

Crunch

Abs · Bodyweight

Hanging Leg Raise

Abs · Bodyweight

Machine Crunch

Abs · Machine

Decline Crunch

Abs · Bodyweight

Ab Wheel Rollout

Abs · Bodyweight

Programming: sets, reps & when to use it

Program the cable crunch as your primary loaded ab builder in the 12–20 rep range, picking a weight you can control through a full curl. Because it overloads, treat it like a working set: add weight over time rather than only adding reps.

Frequently asked questions