Exercise movement reviewed by:Marie Braga, PT, DPT, CSCS

How Iridium Programs This

Iridium tracks workload on the lateral deltoid separately from the anterior deltoid, allowing it to program this isolation movement to meet hypertrophy volume targets without overtraining the pressing muscles used in compound lifts. Because cable stacks often have large weight increments relative to shoulder strength, the AI relies on RPE trends to guide progressive overload, often increasing reps to confirm strength gains before suggesting a heavier weight.

Form Cues

Stand tall with your feet shoulder-width apart and core braced
Lead the movement with your elbows, not your hands
Maintain a slight bend in your elbow throughout the lift
Raise the handle until your arm is parallel with the floor
Control the weight slowly on the way down to maximize tension

Don't

Don't use momentum or swing your torso to lift the weight
Don't shrug your shoulders or engage your traps to initiate the pull
Don't raise your hands higher than your elbows
Don't lock your elbows completely straight
Don't let the weight stack slam down between reps

Common Mistakes

Using excessive momentum to swing the weight up
Letting the traps take over by shrugging
Positioning the hands higher than the elbows at the top
Rushing the lowering phase of the movement

Muscles Worked

This exercise primarily isolates the lateral deltoid, which is essential for creating the appearance of broader shoulders and a V-taper physique. Unlike dumbbell variations, the cable provides constant tension on the muscle fibers from the very bottom of the movement to the top, also engaging the forearms and core for stability.