18/01/2026
Ever been told to keep your spine completely neutral when lifting your arms overhead?
It is a super common cue. Usually to stop rib flaring or excessive arching. And honestly, it makes total sense if your goal is to look neat and controlled.
But biomechanically, something interesting happens when your arms go overhead...
Your thoracic spine naturally goes into a small amount of extension. Around 10 to 15 degrees.
This subtle movement helps the shoulder blades rotate smoothly over the ribcage.
Why does that matter?
Because it means not all the movement has to come from your shoulders. Your spine joins the party and shares the workload.
This does not mean you should be throwing your ribs forward or arching your lower back...
It simply means we do not need to lock the spine into place either.
Instead of holding everything rigid, allow your spine to gently respond to the movement of your shoulder girdle.
Try these cues in your next class:
"Feel your mid back softly bend as you lift your arms overhead."
"Notice your sternum floating up like a feather as your arms rise."
"Allow your spine to adjust as your shoulder blades glide forward over your ribs."
Your thorax is the dynamic foundation for effortless shoulder movement.
Let it move.
Movement is medicine
-Tom Waldron