Exercise guide
Cross Standing Crunch
- Beginner
- Compound
- Rep-based
- Waist
The Cross Standing Crunch is a functional core exercise that targets the obliques and rectus abdominis through rotational flexion while engaging the hip flexors and quadriceps for balance. It improves coordination and core stability without the need for floor-based movements.
Reviewed by the Crucible Fit team · Updated June 2026
Muscles worked
Setup
- Stand with your feet hip-width apart and a slight bend in your knees.
- Place your fingertips lightly behind your ears or at your temples, keeping your elbows flared out wide.
- Engage your core and maintain a tall, upright posture with your gaze forward.
How to do it
- Exhale as you lift your right knee toward your chest while simultaneously rotating your torso to bring your left elbow toward the rising knee.
- Crunch your ribcage toward your pelvis, feeling the contraction in your obliques and abdominals.
- Inhale as you return your foot and torso to the starting position with control.
- Repeat the movement on the opposite side, alternating legs and elbows for each repetition.
Form checklist
- Focus on rotating the torso rather than just pulling the elbow forward.
- Avoid pulling on your head or neck with your hands.
- Keep the standing leg stable and slightly bent to maintain balance.
- Ensure the knee comes up past hip height to fully engage the lower abs and hip flexors.
Pro tips
- Pause for a one-second squeeze at the peak of the contraction to maximize mind-muscle connection with the obliques.
- Think about bringing your shoulder toward the opposite hip rather than just elbow to knee for deeper core activation.
Make it harder
- Slow down the eccentric (lowering) phase to three seconds to increase time under tension.
- Hold a light dumbbell or medicine ball at chest level to add resistance to the rotational movement.
Frequently asked
- What muscles does the cross standing crunch work?
- The cross standing crunch primarily targets the abs and obliques, and also works the erector spinae as secondary muscles.
- What equipment do you need for the cross standing crunch?
- The cross standing crunch requires no equipment — just your body weight.
- Is the cross standing crunch good for beginners?
- Yes. The cross standing crunch is a beginner-friendly movement and a strong foundation to build on.