Lie on incline bench facing away from high pulley. Grasp cable attachment overhead with overhand narrow grip. Position elbow to sides, slightly up.
Extend arms with elbows stationary. Return until forearm is close to upper arm. Repeat.
If high pulley is adjustable, lower pulley slightly to provide resistance at top of motion. If high pulley is fixed, position bench distance away from cable column. If incline is positioned too high, range of motion at lower position may be compromised.