Experiencing Shoulder pain when you run?
When I go out on runs solo or with my running mates, I see A LOT of people rounding with rounded shoulders far more vastly than people running with their shoulders neutral.
If you are experiencing shoulder pain it will most likely be from possible pinching of tendons in the shoulder, or excessive strain in the tendons.
If you do no dedicate any time to balancing the upper trunk and shoulders- YOU SHOULD BE! We swing our arms thousands of times during the course of our training and racing.