Exercise guide
Cable Kneeling Side Crunch
- Intermediate
- Isolation
- Rep-based
- Waist
The Cable Kneeling Side Crunch is a targeted isolation exercise that uses constant cable tension to develop the obliques and improve lateral core stability. By performing the movement from a kneeling position, you eliminate leg drive and force the core to handle the entire load.
Reviewed by the Crucible Fit team · Updated June 2026
Muscles worked
Setup
- Attach a rope handle to a high pulley station.
- Kneel sideways to the cable machine with your knees hip-width apart and your body about two feet away from the stack.
- Grasp the rope with both hands and pull it down so your hands are positioned on either side of your head or resting against your neck.
- Ensure your torso is upright and your hips are square, facing forward.
How to do it
- Exhale and crunch your torso sideways, moving your elbow toward the hip furthest from the machine.
- Focus on shortening the distance between your lower ribs and your hip bone while keeping your lower body completely still.
- Inhale as you slowly return to the upright starting position, resisting the pull of the cable to maintain tension.
- Complete the desired number of repetitions on one side before switching to face the opposite direction.
Form checklist
- Keep your hips locked in place; do not sit back on your heels or shift your weight side-to-side.
- Ensure the movement comes from lateral flexion of the spine, not by pulling the rope with your arms.
- Maintain a neutral neck position by keeping your hands fixed against your head.
- Avoid leaning forward or rounding your shoulders; stay in a strictly lateral plane.
Pro tips
- Squeeze your glutes throughout the set to create a 'pillar' of stability in your lower body, which better isolates the obliques.
- Visualize your obliques acting like an accordion, stretching at the top and fully compressing at the bottom of the movement.
Make it harder
- Incorporate a two-second isometric hold at the point of maximum contraction to increase time under tension.
- Move slightly further away from the machine to increase the lateral pull and the required stabilization.
Frequently asked
- What muscles does the cable kneeling side crunch work?
- The cable kneeling side crunch primarily targets the abs and obliques, and also works the erector spinae as secondary muscles.
- What equipment do you need for the cable kneeling side crunch?
- The cable kneeling side crunch uses cable and rope.
- Is the cable kneeling side crunch good for beginners?
- The cable kneeling side crunch is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.