Dumbbell Russian Twists

Target muscles

The obliques drive the trunk rotation. The rectus abdominis braces continuously to hold the spinal flexion. The hip flexors hold the legs in the raised position. The deep core stabilizes the spine through the rotation. The grip and forearms hold the dumbbell. As an ab exercise, this loads the rotational function of the trunk — the kind of work that carries over to throwing, swinging, and athletic rotation under load.

How to perform

Setup

Sit on the floor with knees bent, feet slightly raised. Lean the torso back to roughly 45 degrees. Hold a dumbbell vertically with both hands cupping one end, the bell at the chest. Trunk braced.

Execution

Rotate the torso to one side, touching the dumbbell to the floor on that side. The hips stay still — the rotation comes from the trunk, not from twisting the legs. Rotate to the other side, touching the floor on the opposite side. Continuous alternating. The dumbbell should reach the floor each side; if it doesn't, the rotation is incomplete.

Common mistakes

• Rotating just the arms. The rotation should come from the trunk; the arms move with the torso.
• Letting the feet drop to the floor between reps. Keep them raised.
• Going too heavy. The rotation demands controlled form; ego loading lets the back compensate.
• Rushing the reps. Slow controlled rotation trains the trunk; fast sloppy rotation trains nothing.
• Letting the lumbar round hard. Maintain a slight forward lean but not a collapsed spine.

Progressions and regressions

Regress to bodyweight Russian twists (no dumbbell) until the rotation pattern is clean. To progress, increase the dumbbell load, work pause Russian twists (1-second pause at each floor touch), or chain with bicycle crunches for a combined trunk circuit.

Programming notes

Excellent rotational trunk work. 3 sets of 12-20 reps total (count both sides). Two or three times a week. Pair with anti-rotation work (Pallof presses) and spinal-flexion work (cable crunches) for a complete trunk program.