This exercise is especially good for the ending range of motion in the tricep. It works the long head of the tricep and is responsible for improving definition in the entire muscle
How to do: 1. Lie down on a flat bench.
2. Using a neutral grip, hold a Roto-Bar or dumbbells in your hands with your arms extended and held at a 45 degree angle behind the head.
3. Inhale, hold your breath as you bend your elbows and forearms until they hang straight behind your head.
4. Keep your elbows in place.
5. When you reach the bottom of the movement, extend your arms at the elbow joints until fully extended.