Exercise guide
Roll Ball Rhomboid
- Beginner
- Isolation
- Timed hold
- Back
This isolation exercise uses a medicine ball against a wall to target the rhomboids and middle trapezius through controlled scapular retraction. It is highly effective for improving postural alignment and scapular stability by focusing on the mind-muscle connection in the mid-back.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Stand facing a wall with your feet shoulder-width apart and a slight bend in your knees.
- Hold a medicine ball against the wall at shoulder height with one hand, arm fully extended but not locked.
- Place your opposite hand on your hip or behind your back to ensure your torso remains square to the wall.
How to do it
- Inhale and slowly roll the ball horizontally across the wall toward your midline by retracting your shoulder blade toward your spine.
- Exhale as you squeeze the shoulder blade at the end of the range of motion, ensuring the movement comes from the back and not the arm.
- Slowly return to the starting position with a controlled 2-second tempo, allowing the shoulder blade to protract slightly.
- Complete the set on one side before switching, or alternate sides by swapping the ball between hands after each repetition.
Form checklist
- Keep your shoulder depressed and away from your ear to avoid upper trap compensation.
- Ensure your hips and chest remain square to the wall; do not rotate your torso to move the ball.
- Maintain a soft bend in the elbow to keep the tension on the back muscles.
- Focus on the 'squeeze' of the shoulder blade toward the center of your back.
Pro tips
- Think of your arm as a lever and your shoulder blade as the motor; the ball should only move because your scapula is moving.
- Pause for one second at the point of maximum retraction to intensify the contraction of the rhomboids.
Make it harder
- Use a heavier medicine ball to increase the frictional resistance against the wall.
- Perform the movement while standing on one leg to add a significant core and balance challenge.
Frequently asked
- What muscles does the roll ball rhomboid work?
- The roll ball rhomboid primarily targets the trapezius, and also works the rhomboids as secondary muscles.
- What equipment do you need for the roll ball rhomboid?
- The roll ball rhomboid uses medicine ball.
- Is the roll ball rhomboid good for beginners?
- Yes. The roll ball rhomboid is a beginner-friendly movement and a strong foundation to build on.