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.

Exercise movement reviewed by:Marie Braga, PT, DPT, CSCS
How Iridium Helps

Since postural muscles recover differently than prime movers, the AI analyzes your recovery status and previous pushing volume to prescribe the optimal frequency for this pre-hab movement. If you report shoulder discomfort, the app can intelligently swap heavy pressing for this corrective exercise to maintain training volume while addressing stability issues. Furthermore, by tracking RPE, the AI ensures you select a band tension that allows for peak contraction without compromising form or compensating with the upper traps.

Form Cues

Do
  • 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
  • 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

RhomboidsPosterior Deltoid

Secondary

Middle Trapezius

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