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Cross-body shoulder stretch

How to do the Cross-body shoulder stretch correctly: it targets the Posterior deltoid and infraspinatus, the hold is 30 s per side, and the steps below keep it on the muscle instead of the joint.

This is mobility information, not physiotherapy and not a diagnosis. Pain is the border: a stretch that hurts at the attachment, sharpens, or sends pins and needles down the limb is loading a nerve or a tendon, not a muscle — stop and, for anything that persists or radiates, see a clinician. After an injury or surgery, stretching follows the treating clinician's protocol, not this page.

How to do it

1. Bring one arm across the chest at shoulder height.
2. Hook the other forearm over it, above the elbow, and draw the arm toward the chest.
3. Keep the stretched shoulder down, away from the ear — the shoulder blade stays put.
4. Hold 30 seconds and switch.

Why this stretch exists

The back of the shoulder does the decelerating in every throw, swing and stroke, and in runners it carries the arm swing for thousands of strides. The cross-body stretch reaches the posterior deltoid and the infraspinatus through the safest possible position — the arm in front of the body, where the shoulder joint is most stable — which is why it is the one shoulder stretch that survives almost every shoulder protocol. It appears in the running routine because arm carriage tightens exactly this tissue over long distances.

Do not stretch into pain at the front of the shoulder, which signals the joint rather than the muscle. Anyone with a rotator cuff injury stretches only within their clinician's protocol — the infraspinatus is often part of the injured structure itself.

Hold and frequency figures: the standard stretching and range-of-motion literature — 15–60 second holds, two to four rounds per muscle (about 60 seconds total), two to three sessions a week for measurable gains, static holds after activity or as their own session, dynamic movement before. The injury-prevention position: the systematic reviews — stretching does not prevent injury or soreness; it buys range of motion and comfort. Checked 2026-09-06.

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