2) One arm cable reverse pressdowns

This exercise specifically aims for the inner head of the triceps and the upper part of the outer head. It provides for better concentration on each of the arms (since they’re worked alternatively) and continuous resistance to work against.
The subject grabs hold of a handle attached through a cable to an overhead pulley with an underhand grip. Keeping the elbow completely motionless extends the arm in an arc-like motion to the front and down. Pausing for a second lets the handle back up slowly and under control.
Extra considerations: - concentrate on a motion range as complete as possible.