Jan 15, 2013, 1:06 PM
Registered: Nov 21, 2007
Internal rotation targets the subscapularis which is the largest of the four RC muscles.
Most people over time have a tendency to round their shoulders inward. Slouching, poor posture, and extended time at the computer are contributors to this. As climbers we are especially prone to rounded shoulders due to the mechanics of our activity. When the shoulders round, they turn inward and rise a bit in the socket. This can lead to impingements which put pressure on the cuff attachment and lead to pain, dysfunction, etc.
I think internal rotation can contribute to pulling the shoulders in. We want the our shoulders down and back. Scapular stabilization exercises as well as external rotation are very effective in achieving this.
(This post was edited by Jnclk on Jan 15, 2013, 1:09 PM)