Hanging and Brachiation: Why Our Primate Shoulders Love to Reach

Brachiation is the arm-over-arm swinging that some primates use to move through trees. Humans can hang too, and many of us enjoy reaching overhead.

The shoulder is a shallow ball-and-socket joint. It gains a very wide range of motion by trading away some built-in stability. Muscles and ligaments around the joint, including the muscles on the shoulder blade (scapula), do much of the work of holding it steady.

When you hang, your body weight pulls the arm up and the shoulder blade has to stay controlled. That is a different demand from a gentle circle, and it is why hanging suits some shoulders and not others.

• Exercise-based programs reduce pain and improve function and range of motion in middle-aged and older adults with rotator-cuff-related shoulder pain [R04].
• A 2025 review of specific exercise types found that scapular stabilization exercise improved pain and function [R03]. Hanging was not among the approaches it reported.
• Shoulder problems are often linked with weaker joint position sense. Rehab usually moves from range of motion, to strength, then to control and coordination [R16].
• There isn't strong research on dead hangs or brachiation for shoulder pain specifically, so ask your clinician.

1. Start with a seated reach. Sit tall and lift one arm overhead slowly, as if placing a cup on a high shelf, then lower it.
2. Try a supported hang. Hold a sturdy counter or bar with your feet still on the floor so you control how much weight goes through your arms.
3. If you feel comfortable, try a very short hang. Stop as soon as the shoulder aches, pinches or feels unstable.
4. Keep the shoulder blades gently active. Do not let the joint dangle in a way that causes sharp pain.
5. Skip hanging entirely if your shoulder is painful at rest, if you have sudden weakness, or if you have tingling in the arm or hand.
6. Stop and rest if pain lingers the next day.