Exercise guide
Cable Standing One Arm Serratus Obliques Crunch
- Beginner
- Compound
- Rep-based
- Waist
This unilateral exercise isolates the obliques and serratus anterior through lateral trunk flexion, enhancing core definition and lateral stability. By using a cable, you maintain constant tension on the lateral abdominal wall throughout the entire range of motion.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Set the cable pulley to the highest setting and attach a D-handle.
- Stand sideways to the machine and grasp the handle with the hand closest to the pulley using an overhand grip.
- Reach across with your outside arm to hold a pull-up bar or the cable frame for stability.
- Position your feet shoulder-width apart with a slight bend in the knees and a neutral spine.
How to do it
- Exhale as you pull the handle downward by flexing your torso laterally, driving your elbow toward your hip.
- Focus on 'crunching' the side of your ribcage down while keeping your arm fixed in a slightly bent position.
- Inhale as you slowly return to the starting position, allowing the cable to provide a gentle stretch in the obliques.
- Perform all reps on one side before switching to the other, maintaining a controlled 2-1-2 tempo.
Form checklist
- Keep your hips and pelvis stationary; do not let them sway side-to-side to cheat the movement.
- Ensure the movement originates from the waist, not by pulling with the bicep or shoulder.
- Keep your chest facing forward throughout the entire set—avoid rotating your torso toward the floor.
- Maintain a neutral neck position, looking straight ahead rather than down at the floor.
Pro tips
- Focus on the 'mind-muscle connection' by visualizing the serratus muscles—the finger-like muscles over the ribs—contracting to pull the weight down.
- Keep the working arm locked in place to ensure the core does the work rather than the lats or arms.
Make it harder
- Incorporate a 3-second isometric hold at the bottom of the crunch to maximize muscle fiber recruitment.
- Increase the range of motion by allowing the cable to pull your torso into a deeper lateral stretch at the top of each rep.
Frequently asked
- What muscles does the cable standing one arm serratus obliques crunch work?
- The cable standing one arm serratus obliques crunch primarily targets the obliques, and also works the serratus anterior as secondary muscles.
- What equipment do you need for the cable standing one arm serratus obliques crunch?
- The cable standing one arm serratus obliques crunch uses cable.
- Is the cable standing one arm serratus obliques crunch good for beginners?
- Yes. The cable standing one arm serratus obliques crunch is a beginner-friendly movement and a strong foundation to build on.