Dumbbell Seated One Arm Rotate

Setup

1. 01Sit on a bench and rest the working forearm along your thigh, wrist just past the knee.
2. 02Hold a light dumbbell, ideally gripped toward one end so it acts as a lever.
3. 03Start with the palm facing sideways in a neutral position.
4. 04Keep the elbow and forearm pinned to the thigh throughout.

Execution

1. 01Slowly rotate the forearm to turn the palm up as far as comfortable.
2. 02Reverse and rotate until the palm faces down.
3. 03Control the dumbbell through the whole arc; do not let it fall through the turn.
4. 04Complete the reps, then switch arms.

Checkpoints

• -Rotation comes from the forearm, not the shoulder or wrist alone.
• -The elbow never lifts off the thigh.
• -Speed stays slow and even in both directions.
• -The dumbbell stays under control at the end ranges.

Common mistakes

• -Using a dumbbell too heavy to stop at the end ranges.
• -Letting the elbow rise and turning it into a shoulder movement.
• -Whipping the weight through the rotation with momentum.
• -Gripping mid-handle, which removes most of the leverage challenge.