How Iridium Programs This

Since band tension varies based on stretch and anchor point, Iridium relies on your RPE inputs rather than absolute weight to drive progressive overload. The AI tracks these sets against your posterior deltoid weekly volume landmarks, ensuring you achieve sufficient stimulus without exceeding your Maximum Recoverable Volume for this specific muscle group.

Form Cues

Stand with feet shoulder-width apart and knees slightly bent for stability.
Keep your arms extended at chest height with a slight bend in the elbows.
Initiate the movement by driving your hands out and back in a wide arc.
Squeeze your shoulder blades together firmly at the peak of the contraction.
Control the bands slowly as you return to the starting position to maximize time under tension.

Don't

Don't shrug your shoulders up toward your ears during the pull.
Don't bend your elbows excessively, turning the fly into a row.
Don't let the band snap your arms back forward uncontrollably.
Don't arch your lower back to generate momentum.
Don't jut your head forward as you pull the bands apart.

Common Mistakes

Shrugging shoulders upward
Excessive elbow bending (rowing motion)
Using momentum or swinging
Uncontrolled return phase
Jutting the head forward

Muscles Worked

This exercise primarily isolates the posterior deltoids, which are crucial for shoulder health and counteracting rounded posture. It also engages the rhomboids and middle trapezius to retract the scapula, helping to build a thicker, more detailed upper back.