Dumbbell Lying One-Arm Supinated Triceps Extension
The one-arm lying extension held underhand, palm toward the head; the grip is the only change from the overhand version.
How to do it
Setup
Lying on a bench, one bell above the shoulder, palm toward the head, free hand on the working arm.
Steps
- Lower the bell toward the head by bending the elbow.
- Keep the palm turned toward the head.
- Straighten the arm back over the shoulder.
Common mistakes
Grip turning back to neutral as you tire: keep the palm to the head. Wrist folding under the bell: keep it straight; go lighter. Lowering onto the face: control the bell and stop short.
Breathing
Inhale lowering, exhale extending.






