Intermediate

Medicine Ball Russian Twist

Adding a medicine ball to the Russian twist loads the obliques through their rotational range and turns a bodyweight drill into a real strength exercise for the trunk. Holding the feet off the floor also forces the lower abs and hip flexors to stabilize a hollow position while you rotate. Move deliberately and rotate from the trunk rather than just swinging the arms across your body.

Equipment
Medicine Ball
Body part
Abs
Type
Functional, Strength
Browse by movement
Rotation
Muscles worked
Target
Abdominal External Oblique
Secondary
Upper Rectus Abdominals, Lower Rectus Abdominals
Tertiary
Rectus Femoris, Erector Spinae

How to do it

  1. 1

    Sit on the floor with the knees bent and heels lightly touching down or hovering.

  2. 2

    Lean the torso back to about forty-five degrees and hold the ball at the chest.

  3. 3

    Brace the abs and keep the chest tall through a long spine.

  4. 4

    Rotate the trunk to one side and bring the ball toward the floor beside the hip.

  5. 5

    Reverse smoothly and rotate to the opposite side.

  6. 6

    Alternate sides for the prescribed reps, keeping the motion controlled.

Tips

  • Turn from the ribcage and trunk, not by flinging the arms side to side.
  • Hold the torso angle steady so the abs stay under tension the whole set.
  • Raise the feet off the floor to make it harder or keep them down to make it easier.

Variations

Common mistakes

  • Letting the arms straighten so the ball travels far from your chest, which turns the set into a shoulder exercise and pulls the trunk angle upright.
  • Grabbing a ball heavy enough that the torso creeps up over the set; the angle you finish at should be the angle you started at.
  • Slamming the ball beside the hip and letting it stop the rotation for you instead of controlling the turn and reversing under tension.
  • Pressing the heels hard into the floor to drive the twist, which makes the legs the engine and quietly rests the obliques.
  • Holding your breath through a set of twenty; short exhales on each turn keep the brace and the trunk angle from sagging.

Frequently asked

What weight ball and how many reps for the medicine ball Russian twist?
Four to eight pounds is the usual starting range, with three sets of 20 taps, ten per side, each rep taking two to three seconds. Add reps up to 30 before you add weight, since the limiting factor is usually holding the lean rather than moving the ball. Two sessions a week. If you cannot keep the chest tall for all 20, use a lighter ball rather than shortening the turn.
What can I use instead of a medicine ball for this twist?
A dumbbell held vertically by one end is the closest match and easier to grip; a plate held at the edges, a kettlebell by the horns, or a filled water jug all work at home. A cable or band anchored at chest height turns it into a standing rotation, which is a different exercise but a good option if sitting and twisting under load does not suit you. Whatever you use, keep it close to the sternum.
What does the medicine ball Russian twist actually train?
It loads rotation, so the obliques work as movers rather than only as stabilizers, while the hip flexors and rectus abdominis hold the leaning torso in place. It suits sports with a throwing or swinging action and adds variety to core work that is otherwise all planks. It is a poor first ab exercise, and it is the wrong choice on a day when heavy deadlifts have already left your low back tired; loaded twisting is not what a fatigued spine needs.

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