Exercise guide
Cross Mountain Climber Against Wall
- Intermediate
- Compound
- Timed hold
- Waist
This standing core variation uses wall support to reduce intensity while targeting the obliques and rectus abdominis through rotational knee drives. It is an effective entry-level exercise for developing core stability and shoulder endurance without the strain of a floor-based plank.
Reviewed by the Crucible Fit team · Updated June 2026
Muscles worked
Setup
- Stand facing a wall approximately arm's length away.
- Place your palms flat on the wall at shoulder height and shoulder-width apart.
- Step your feet back until your body is at a slight incline, supporting your weight on the balls of your feet.
- Engage your core and tuck your pelvis slightly to create a straight line from your head to your heels.
How to do it
- Exhale as you drive your right knee up and across your body toward your left elbow, rotating through the midsection.
- Inhale as you slowly return your right foot to the starting position with control.
- Repeat the movement with your left knee, driving it toward your right elbow.
- Maintain a steady, rhythmic tempo, alternating sides while keeping your upper body stable.
Form checklist
- Keep your arms straight and actively push away from the wall to engage your shoulders.
- Ensure the rotation occurs at the waist rather than just swinging the leg.
- Keep your hips level and avoid letting your lower back arch or sag.
- Maintain a neutral neck by looking at the wall directly between your hands.
Pro tips
- Focus on a hard 'crunch' sensation in your obliques at the peak of the knee drive.
- Keep your standing leg's glute squeezed to provide a stable anchor for the rotating leg.
- Imagine pulling your belly button toward your spine throughout the entire set to maintain deep core activation.
Make it harder
- Step your feet further back from the wall to increase the incline and the load on your core.
- Perform the movement with a 3-second pause and squeeze when the knee is at its highest point across the body.
Frequently asked
- What muscles does the cross mountain climber against wall work?
- The cross mountain climber against wall primarily targets the deltoids, and also works the hamstrings and hip flexors as secondary muscles.
- What equipment do you need for the cross mountain climber against wall?
- The cross mountain climber against wall requires no equipment — just your body weight.
- Is the cross mountain climber against wall good for beginners?
- The cross mountain climber against wall is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.
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- Alternate Knee Raise Side ReachBeginner · abs, deltoids, and obliques
- Alternate Leg Lift Tap Arms CircleIntermediate · abs, deltoids, obliques, and pectorals