Sit at edge of bench with feet of floor ahead of knees. Rest torso on thighs. Reach under legs and grasp stirrup cable attachments, right hand holding left stirrup, left hand holding right stirrup.
Pull stirrups out to sides until elbows are shoulder height. Maintain upper arms perpendicular to torso and fixed elbow position (10° to 30° angle) throughout exercise. Lower until arms contact sides of legs. Repeat.
Upper arm should travel in perpendicular path to torso to minimize Latissimus Dorsi involvement. If stirrups are not within reach, training partner can hand exercises cable attachments.
Alternatively, before sitting on bench, stirrups can be pulled in from each side and switched to opposite hands under legs by temporarily securing one stirrup with hooked thumb from behind, so released opposite hand can retrieve other stirrup from behind.