ExercisesSeated medicine ball trunk rotation

Seated medicine ball trunk rotation

Sit tall with knees bent, holding the ball at your chest, and rotate your torso side to side, touching the ball near each hip. Move from your trunk, not your arms.

CoreMedicine ballDifficulty 1 of 3
Two-panel demonstration of the seated medicine ball trunk rotation, showing the start and finish positions
Start and finish positions

How to do it

Sit tall with knees bent, holding the ball at your chest, and rotate your torso side to side, touching the ball near each hip. Move from your trunk, not your arms.

Muscles worked

Front
Back
  • obliquesprimary
  • core

Hover a muscle to find it on the figure. Dark green is the primary mover, lighter green is supporting work.

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Other options in this pattern

How many sets should you do?

That depends on your goal, your ability, and how many days you train. Answer three questions and the builder works out your sets and reps, plus a full week around them.

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Johnny Milaychev · Product manager and self-directed lifter, not a trainer or a clinician. Why that matters and where this guidance stops.
Reviewed 16 August 2026 · Exercise library v2.2