Arm-Up Rotator Stretch

Muscles worked

Setup

1. Stand or sit with a tall, neutral spine and shoulders pulled back and down.
2. Raise your target arm to shoulder height and bend the elbow to 90 degrees, so your fingers point toward the ceiling.
3. Reach across with your opposite hand and place it on the front of the raised wrist or forearm.

How to do it

1. Gently pull the forearm backward, rotating the upper arm bone within the shoulder socket while keeping the elbow fixed in space.
2. Inhale deeply to expand the ribcage, and exhale as you slowly increase the depth of the stretch.
3. Hold the position for 20-30 seconds, maintaining a steady, controlled breathing pattern before switching sides.

Form checklist

• Keep the elbow at the same height as the shoulder throughout the stretch.
• Avoid shrugging the shoulder toward the ear; keep the scapula depressed.
• Ensure the movement comes from the shoulder joint, not by arching the lower back.
• Stop immediately if you feel any sharp pinching in the front of the shoulder joint.

Pro tips

• Focus on the mind-muscle connection by visualizing the head of the humerus spinning in place rather than shifting forward in the socket.
• Keep your core braced to prevent the torso from twisting toward the stretching arm, which maintains the isolation of the rotator cuff.

Make it harder

• Use a wall or doorframe as a fixed anchor for the back of the arm to provide more leverage for the stretch.
• Incorporate PNF stretching by pushing your wrist against your hand for 5 seconds, then relaxing into a deeper range of motion.

Frequently asked

What muscles does the arm-up rotator stretch work?

The arm-up rotator stretch primarily targets the deltoids, and also works the rotator cuff as secondary muscles.

What equipment do you need for the arm-up rotator stretch?

The arm-up rotator stretch uses dumbbell.

Is the arm-up rotator stretch good for beginners?

Yes. The arm-up rotator stretch is a beginner-friendly movement and a strong foundation to build on.

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