Resistance Band Pullapart (Pronated at 90 Degrees) exercise animation (Male)

Resistance Band Pullapart (Pronated at 90 Degrees)

Target muscle
—
Equipment
Resistance Band
Body part
Shoulders
Type
Strength

The resistance band pullapart (pronated at 90 degrees) is a shoulder exercise that targets the rear deltoids and the muscles of the upper back responsible for horizontal shoulder abduction. You hold the band at shoulder height with an overhand grip, then pull both ends apart until the band touches your chest. It is commonly used to improve shoulder health, posture, and upper-body pulling performance.

How to do the Resistance Band Pullapart (Pronated at 90 Degrees)

  1. 1Stand tall with your feet about hip-width apart and your core lightly braced.
  2. 2Hold the resistance band with both hands using an overhand (pronated) grip, hands roughly shoulder-width apart.
  3. 3Raise your arms to shoulder height so they are parallel to the floor, with the band taut in front of you.
  4. 4Without shrugging or bending your elbows beyond a very slight angle, begin pulling both ends of the band apart horizontally.
  5. 5Continue pulling until the band touches or nearly touches the center of your chest, squeezing your rear deltoids at the end of the movement.
  6. 6Pause for one count at the end range, feeling the tension across the back of your shoulders.
  7. 7Slowly return your hands to the starting position over two to three seconds, maintaining control of the band.
  8. 8Repeat for the target number of reps, keeping your arms at shoulder height throughout the set.

Form tips

  • Keep your arms as straight as possible throughout the movement — only a slight elbow bend is acceptable. Bending them too much turns the exercise into a row.
  • Maintain shoulder height precisely. Letting your arms drift below 90° shifts stress away from the rear deltoids.
  • Choose a band resistance that allows full range of motion with control; if you cannot pull the band to your chest without compensating, use a lighter band.
  • Avoid shrugging your shoulders toward your ears — keep them packed down throughout each rep to prevent the upper traps from taking over.
  • Move slowly on the return phase rather than letting the band snap your hands back, as the eccentric portion builds additional shoulder stability.

Common mistakes

  • Bending the elbows excessively, which converts the pullapart into a rowing motion and reduces the demand on the rear deltoids.
  • Dropping the arms below shoulder height during the pull, which changes the muscle angle and limits the training stimulus to the intended area.
  • Shrugging the shoulders upward, which allows the upper trapezius to dominate instead of the rear deltoids doing the work.
  • Using a band that is too heavy, leading to a shortened range of motion and compensatory body lean or elbow flexion.
  • Rushing through the repetitions — fast, uncontrolled reps reduce time under tension and make it harder to feel the rear deltoids working.

Frequently asked questions

What muscles does the resistance band pullapart (pronated at 90 degrees) work?

It primarily targets the rear deltoids and the horizontal abductors of the shoulder, with secondary involvement from the muscles of the upper back that assist in scapular retraction.

What does 'pronated at 90 degrees' mean?

It means your palms face downward (pronated grip) and your arms are raised to shoulder height (90 degrees to your torso) before you begin pulling the band apart.

How many reps and sets should I do?

Fifteen to twenty-five reps for two to four sets is a common range for this exercise, as it is typically used for shoulder health and muscular endurance rather than max-effort strength.

How is the pronated pullapart different from the standard band pullapart?

The standard pullapart is often done with a neutral or supinated grip, which can place more emphasis on the mid and lower traps. The pronated grip at 90 degrees places the shoulder in a position that more directly challenges the rear deltoids and external rotators.

Can I do this exercise as a warm-up?

Yes — performed with a light band, it is an effective shoulder warm-up before pressing or pulling movements, as it activates the rear deltoids and reinforces proper scapular position.

Related exercises