Triceps Extension (Overhead, One-Arm) - Dumbbell

Sit or stand tall.

Hold dumbbell in one hand, extend arm straight overhead.

Keep upper arm close to head, vertical.

Support elbow with free hand (optional).

Inhale, lower dumbbell behind head by bending elbow.

Lower until forearm touches bicep/full stretch.

Keep upper arm stationary.

Exhale, extend elbow using triceps to push dumbbell back up.

Repeat reps, switch arms.