Talk Tennis - View Single Post - Shoulder Issues -- Therapies, Surgeries, Etc.

Chas Tennis · 01-02-2013, 09:24 AM

From another thread -

"Best to view the Ellenbecker video as I could misinterpret. At minute 8 he describes the shoulder orientation to minimize the risk of impingement.

http://www.tennisresources.com/index...idid=3712&rv=1

Think of the line between the two shoulders and the line of the upper arm. If those lines fell in a straight line, the angle is 180°, and the shoulder internally rotates (upper arm axial rotation) well and impingement risk is low. As the upper arm rises relative to the shoulders the risk increases. I have read that 170° is still OK. Let's say that it is higher than recommended, at 150° for example - then there is more risk of impingement.

You can also visualize the angle by extending the shoulder-shoulder line and considering the complementary angle. Then for example, 0° is upper arm straight out, 10° is the upper arm up slightly and still OK, 30° is the upper arm up and at increased risk of impingement.

I see many players serving well beyond the 10°.

The shoulder orientation requires lateral trunk flexion which may stress the back for some people."

01-02-2013, 09:24 AM	#703
Chas Tennis Professional Join Date: Feb 2011 Location: Baltimore, MD Posts: 1,319	From another thread - "Best to view the Ellenbecker video as I could misinterpret. At minute 8 he describes the shoulder orientation to minimize the risk of impingement. http://www.tennisresources.com/index...idid=3712&rv=1 Think of the line between the two shoulders and the line of the upper arm. If those lines fell in a straight line, the angle is 180°, and the shoulder internally rotates (upper arm axial rotation) well and impingement risk is low. As the upper arm rises relative to the shoulders the risk increases. I have read that 170° is still OK. Let's say that it is higher than recommended, at 150° for example - then there is more risk of impingement. You can also visualize the angle by extending the shoulder-shoulder line and considering the complementary angle. Then for example, 0° is upper arm straight out, 10° is the upper arm up slightly and still OK, 30° is the upper arm up and at increased risk of impingement. I see many players serving well beyond the 10°. The shoulder orientation requires lateral trunk flexion which may stress the back for some people."