stackyFACTS
Health

Pectoralis major primarily forces internal arm rotation

HERE’S THE INTERESTING PART

While visually celebrated entirely for looking impressive under a tight shirt, the massive chest fan exists almost exclusively to yank your arms inward and rotate them across your torso. It is a brutal mechanical lever highly optimized for violently throwing objects or crushing things directly in front of you.

Pectoralis major primarily forces internal arm rotation
STACKY / Health
One discovery leads to another.

Keep exploring facts in this topic.

Health →
STACKY FOR IPHONE

A bigger world.
One discovery
at a time.

Keep discovering with Stacky. Interesting facts in an app that is always within reach.

Download on the App Store
ONE MORE DISCOVERY?

Keep exploring

All in this topic →
StackyMore discoveries in the app
Download on the App Store