Arm Up Rotator Stretch
- Target muscle
- —
- Equipment
- Body weight
- Body part
- Shoulders
- Type
- Stretching
The arm up rotator stretch is a bodyweight mobility drill for the shoulders that opens up the rotator cuff and the front of the shoulder. With your upper arm out to the side and your forearm raised, you gently rotate the shoulder to stretch the muscles that control overhead and rotational movement. It is a useful warm-up or cool-down for pressing, throwing, and overhead work.
How to do the Arm Up Rotator Stretch
- 1Stand or sit tall with your core braced, chest up, and shoulders relaxed away from your ears.
- 2Raise your right upper arm out to the side until it is parallel to the floor, with your elbow bent to 90 degrees.
- 3Rotate your forearm upward so your fingers point toward the ceiling and your palm faces forward.
- 4Place your left hand on your right forearm or wrist to guide the movement, keeping your upper arm level throughout.
- 5Gently press the forearm back, externally rotating the shoulder until you feel a mild stretch across the front of the shoulder and rotator cuff.
- 6Hold the position for 20 to 30 seconds while breathing slowly and keeping your shoulder blade settled down and back.
- 7Release the stretch under control, lower the arm, and repeat on the left side.
Form tips
- Move into the stretch slowly and stop at the first point of mild tension, never at sharp pain.
- Keep your upper arm parallel to the floor so the rotation comes from the shoulder rather than from dropping the elbow.
- Keep your shoulder blade pulled down and back to protect the joint and target the rotator cuff cleanly.
- Breathe steadily and let the muscle relax a little deeper on each exhale instead of forcing the range.
Common mistakes
- Forcing the forearm back too hard, which can strain the rotator cuff instead of gently lengthening it.
- Letting the elbow drop below shoulder height, which shifts the stretch off the rotator cuff and reduces its effect.
- Shrugging the shoulder up toward the ear, which adds tension to the neck and traps and reduces the stretch.
- Bouncing or jerking into the stretch rather than holding a steady position, which raises the risk of injury.
Frequently asked questions
What muscles does the arm up rotator stretch work?
It stretches the muscles of the shoulder, mainly the rotator cuff and the front of the shoulder that control external rotation. It is a mobility stretch rather than a strengthening exercise.
How long should I hold the arm up rotator stretch?
Hold each side for about 20 to 30 seconds and repeat two or three times per side. Keep the stretch gentle and breathe slowly throughout.
Is the arm up rotator stretch good for beginners?
Yes. It uses only your bodyweight, needs no equipment, and is easy to control, so beginners can use it to warm up the shoulders or cool down after upper-body training.
When should I do the arm up rotator stretch?
Use it as part of a warm-up before pressing or overhead work to prime the shoulders, or as a cool-down to ease tension after training. Avoid pushing into pain.
