Pull-Apart (Band)
The Band Pull-Apart is a foundational isolation exercise that targets the rear deltoids and upper back muscles to improve shoulder health and posture. It involves horizontally pulling a resistance band apart with straight arms to strengthen scapular retraction.
Iridium uses this low-fatigue isolation movement to help you reach Minimum Effective Volume for the rear delts and rhomboids without taxing your systemic recovery score. Since quantifying band resistance is difficult, Iridium relies on your RPE and rep performance to verify progressive overload rather than absolute weight metrics. This allows the system to program necessary volume for smaller muscle groups even when recent training history indicates high fatigue in primary movers.
Form Cues
- Keep your elbows straight but not hyper-extended
- Squeeze your shoulder blades together at the peak
- Keep your chest up and ribs down
- Control the return phase slowly
- Pull the band until it touches your chest
- Don't shrug your shoulders up towards your ears
- Don't arch your lower back to complete the rep
- Don't bend your elbows to shorten the lever arm
- Don't let the band snap back quickly
Common Mistakes
- Shrugging shoulders excessively
- Hyperextending the lumbar spine
- Bending elbows to reduce difficulty
- Using momentum to jerk the band
- Gripping the band too narrow
Muscles Worked
This exercise primarily isolates the posterior deltoids and rhomboids, which are critical for scapular retraction and shoulder joint stability. By strengthening the middle trapezius and upper back, it helps counteract the rounded-shoulder posture often caused by frequent sitting and heavy chest pressing.
Primary
Secondary
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