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

How Iridium Programs This

Iridium uses this low-fatigue movement to help you reach Minimum Effective Volume for the posterior deltoids and rhomboids without taxing your central nervous system. Because band tension varies based on stretch, the algorithm prioritizes your reported RPE to gauge intensity and track progressive overload rather than relying solely on weight. This allows the system to add necessary volume to your upper back without negatively impacting your recovery score for heavy compound lifts.

Form Cues

Pull the band towards your forehead while driving your elbows back and out
Externally rotate your hands at the end of the movement so knuckles face the ceiling
Squeeze your shoulder blades together firmly at the peak contraction
Keep your core braced and ribs down to prevent arching your lower back
Control the return phase to keep constant tension on the rear delts

Don't

Don't jut your head forward to meet the band
Don't let your elbows drop below shoulder height during the pull
Don't shrug your shoulders up towards your ears
Don't lean backward to use your body weight for momentum
Don't allow your wrists to curl inward

Common Mistakes

Leading with the hands instead of the elbows
Using too much resistance and compromising range of motion
Jutting the chin forward ('chicken necking')
Shrugging the upper traps excessively
Rushing the eccentric (release) phase

Muscles Worked

This exercise primarily targets the posterior deltoids and the external rotators of the cuff, which are critical for shoulder stability. It also engages the rhomboids and middle trapezius to retract the scapula, helping to pull the shoulders back into a neutral, healthy position.