What weight medicine ball should I use?

Start with a light weight between 4 and 10 pounds to focus on stability. The goal is controlled rotation rather than moving a heavy load.

How do I keep the Swiss Ball from sliding?

Ensure you are using a non-slip surface and keep your weight centered over the ball. Actively engaging your glutes will help anchor your position.

Is this exercise safe for people with lower back pain?

While it builds core strength, the rotational force under load can be stressful for some. Consult a professional if you feel sharp pain, and ensure your spine stays neutral throughout.

How to Do the Medicine Ball Twist on a Swiss Ball

Master the medicine ball twist on a Swiss ball. Follow our step-by-step guide to improve oblique strength and core stability with professional cues.

How to Perform

Sit on the Swiss Ball and walk your feet forward until your upper back and shoulders are supported by the ball.
Raise your hips so your torso is parallel with the floor, creating a straight line from your knees to your head.
Extend your arms straight above your chest while holding the medicine ball with both hands.
Rotate your torso and arms to one side while keeping your hips stable and your lower body locked in place.
Stop when your arms are parallel to the floor, then rotate back through the center to the opposite side.
Continue alternating sides while maintaining a strong bridge position through your glutes.

Common Mistakes

Dropping the hips toward the floor which removes tension from the core.
Moving only the arms instead of rotating the entire ribcage.
Allowing the knees to cave inward or sway during the rotation.

Muscles Worked

Primary movers

Obliquus externus abdominis

Stabilizers

Rectus abdominis
Transversus abdominis
Erector spinae

Related Guides

3008 Abdominal Crunch — Core
Ab Roller — Core
Ab wheel — Core

Obliquus externus abdominis · Core