BodyCraft Strength Training System Exercise Manual page 30

Internal Rotator
Stand beside your machine and adjust the Functional Training Arm to
elbow height. For some, this exercise is more comfortable if you place
a rolled up towel under your upper arm. Grasp the handle, using a
neutral grip, with your inside arm. Rotate your arm, as if it were a
closing door, toward your midsection. Return slowly.
Primary muscles worked: Deltoids (shoulder), Rotator Cuff.
28