Exercise guide
Side Crunch Against Wall
- Beginner
- Compound
- Rep-based
- Waist
This beginner-friendly movement targets the obliques and lateral core by using a wall for stability during lateral flexion. It is highly effective for building waistline strength and improving spinal mobility without the need for heavy weights.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Stand sideways to a wall with your feet hip-width apart, approximately 1-2 feet away from the base.
- Place the hand closest to the wall against it at shoulder height for balance and support.
- Place your outside hand lightly behind your head, keeping the elbow flared out to the side.
- Engage your glutes and core to maintain a neutral spine and upright posture.
How to do it
- Exhale as you perform a side crunch, bringing your outside elbow down toward your hip by contracting your obliques.
- Focus on shortening the distance between your lower ribs and your hip bone on the side away from the wall.
- Inhale as you slowly return to the upright starting position, maintaining tension in the core throughout the descent.
- Complete the desired number of repetitions on one side before turning around to repeat on the opposite side.
Form checklist
- Keep your hips square and facing forward; do not let your pelvis rotate toward or away from the wall.
- Ensure the movement is strictly lateral—avoid leaning forward or rounding your shoulders.
- Maintain a slight, 'soft' bend in your knees to protect your lower back.
- Avoid pulling on your head or neck with your hand; let the obliques do the work.
Pro tips
- To maximize muscle engagement, imagine you are sandwiched between two panes of glass, forcing your body to move only in a side-to-side plane.
- Pause for a one-second peak contraction at the bottom of the crunch to intensify the mind-muscle connection with the obliques.
Make it harder
- Move your feet further away from the wall to increase the angle of the lean, which places more demand on the core stabilizers.
- Hold a light dumbbell or a water bottle in the outside hand (the side being crunched) to add external resistance.
Frequently asked
- What muscles does the side crunch against wall work?
- The side crunch against wall primarily targets the abs and obliques, and also works the erector spinae as secondary muscles.
- What equipment do you need for the side crunch against wall?
- The side crunch against wall requires no equipment — just your body weight.
- Is the side crunch against wall good for beginners?
- Yes. The side crunch against wall is a beginner-friendly movement and a strong foundation to build on.