Step by step
- Sit on a bench with both feet planted and hold a light dumbbell.
- Rest the forearm on your thigh, palm up, with the hand free beyond the knee.
- Lower the hand slowly, then curl it upward at the wrist.
- Keep the forearm still and repeat before switching sides.
Common mistakes
- Lifting the forearm or swinging the weight.
- Letting the dumbbell roll into the fingertips.
Anatomy and technique: the references below. Region boundaries and movement diagrams are schematic. Exercise images are AI-generated illustrations.