Exercise guide
Medicine Ball 45 Degree Side Bend
- Intermediate
- Isolation
- Rep-based
- Waist
This exercise targets the obliques and lateral core stabilizers by using a 45-degree bench to provide a deep stretch and constant tension. The addition of a medicine ball increases the torque on the core, significantly enhancing lateral trunk strength.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Position yourself sideways on a 45-degree hyperextension bench with your hip resting comfortably on the center of the pad.
- Secure your feet firmly under the foot pads, either stacking them or placing the top foot slightly forward for better balance.
- Hold a medicine ball firmly against your chest with both hands.
- Align your body so your head, shoulders, and hips form a straight diagonal line.
How to do it
- Inhale and slowly lower your torso sideways toward the floor, maintaining a neutral spine and avoiding any forward rotation.
- Lower until you feel a deep stretch in the side of your waist (the side facing up).
- Exhale and contract your obliques to pull your torso back up to the starting position, stopping when your body is in a straight line.
- Perform the movement with a controlled 2-1-2 tempo (2 seconds down, 1 second pause, 2 seconds up).
Form checklist
- Keep your chest facing forward; do not let your shoulders rotate toward the floor.
- Ensure the movement occurs at the waist, not by pulling with your neck or shoulders.
- Maintain a slight bend in the knees to avoid overextending the joints.
- Keep the medicine ball tight against your chest to maintain a consistent center of gravity.
Pro tips
- Focus on the 'mind-muscle connection' by visualizing the space between your lower ribs and hip bone closing as you crunch upward.
- Avoid using momentum at the bottom of the stretch; use a dead stop to force the obliques to initiate the lift.
Make it harder
- Hold the medicine ball with arms fully extended away from your chest to increase the lever arm and resistance.
- Incorporate a 2-second isometric hold at the peak of the contraction for maximum muscle fiber recruitment.
Frequently asked
- What muscles does the medicine ball 45 degree side bend work?
- The medicine ball 45 degree side bend primarily targets the abs and obliques, and also works the erector spinae as secondary muscles.
- What equipment do you need for the medicine ball 45 degree side bend?
- The medicine ball 45 degree side bend uses medicine ball.
- Is the medicine ball 45 degree side bend good for beginners?
- The medicine ball 45 degree side bend is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.