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Prone Shoulder Stretch

Lying face down, you thread one arm across beneath your chest with the palm up, letting bodyweight settle gently onto it to stretch the back of the shoulder. It is a floor-based alternative to the standing cross-body stretch, valuable for lifters with cranky rear delts and anyone whose pressing week outweighs their pulling week. Coached by Maddy (NASM-CPT) — these are the exact form cues he gives on every client's first week.

Muscles worked

Rear shoulders · posterior deltoid Side shoulders · medial deltoid Upper traps · upper trapezius Mid back · rhomboids

Sets & reps by goal

Goal	Sets × Reps	Rest
Strength	2 holds x 20-30 sec per arm after upper-body training	switch arms between holds
Muscle	2-3 holds x 30-45 sec per arm	brief between sides
Endurance	2 holds x 45-60 sec per arm on recovery days	switch sides between holds

Level — Beginner

Beginner — intensity is fully self-controlled by how much bodyweight you allow onto the arm.

Proper form — 5 cues

Lie face down and slide one arm straight across underneath your chest, palm facing up.
Position the arm at shoulder height, reaching the fingertips toward the opposite wall.
Lower your chest slowly onto the arm, letting gravity apply the pressure.
Turn your head away from the stretching arm and rest it on the mat.
Adjust intensity by how much bodyweight you allow down — more weight, deeper stretch.

Breathing: Long, slow exhales while the chest settles down — tension leaves the shoulder fastest on the breath out.

The 3 mistakes Maddy corrects most

Dropping full bodyweight onto the arm immediately.. The rear shoulder capsule responds badly to sudden compression — the muscles guard, and the stretch turns into a pinch. Fix: Lower yourself over five slow seconds and stop at the first clear stretch sensation, adding weight only as the tissue relaxes.

Placing the arm too far below shoulder height.. A low arm angle shifts the sensation into the elbow and mid-back rather than the posterior deltoid you are targeting. Fix: Keep the trapped arm level with the shoulder joint, sliding it up or down a few centimetres until the stretch lands on the back of the shoulder itself.

Holding through numbness or tingling in the hand.. Pins and needles mean nerve or blood-flow compression, not muscle stretch, and pushing through it gains nothing. Fix: Come off the arm, shake it out, and re-enter with less bodyweight or a slightly different arm height.

Common questions

What is this stretch actually targeting?

The posterior deltoid on the back of the shoulder, along with the muscles around the shoulder blade that stiffen up from heavy pressing and long desk hours. Because your bodyweight supplies the pressure and the floor fixes the arm, it reaches the area more directly than most standing stretches, where the arm can subtly escape the position.

Prone shoulder stretch vs cross-body arm stretch — which is better?

Same target, different control. The standing cross-body stretch is quick and doable anywhere, but the arm being pulled can drift and the intensity varies with how hard you pull. The prone version pins the arm under a fixed, adjustable amount of bodyweight, giving a deeper and more consistent stretch. Use standing versions at the gym, the prone version in a proper cool-down.

Why does my shoulder pinch at the front during this stretch?

Front-of-shoulder pinching usually means too much bodyweight came down too fast, or the arm angle is wrong for your build, compressing the joint rather than lengthening the rear muscles. Reduce the pressure, move the arm slightly higher or lower, and re-test. If every variation pinches, skip this stretch and have the shoulder assessed — a stretch should never feel like a jam.

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