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Dynamic Chiropractic – December 2, 2008, Vol. 26, Issue 25
Dynamic Chiropractic
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Dynamic Chiropractic

New Positions for Treatment of Tight Posterior Shoulder Capsule

By Warren Hammer, MS, DC, DABCO

Glenohumeral internal rotation deficit (GIRD) has been associated with shoulder internal and external impingement and tendinopathy. It is found in athletes (especially baseball pitchers) and also in nonathletic patients in adhesive capsulitis or just as a limited motion upsetting the normal mechanics of the shoulder.

In the October issue of the American Journal of Sports Medicine, an interesting study evaluated the best position of the scapulohumeral joint to stretch the entire posterior capsule.1 It may be that treating the posterior capsule while it is stretched could be beneficial, especially if we know, based on the position of the shoulder, what part of the capsule is being stretched.

Most of the manual techniques for the posterior capsule, such as Graston Technique (GT), ART and friction massage, to name just a few, treat the posterior capsule with the scapulohumeral joint at 90 degrees of abduction. In both ART and GT, many areas of treatment include motion and stretch. At present, most manual techniques are treating the posterior capsule with the shoulder abducted 90 degrees. Probably most of the capsule is being contacted. The addition of motion and/or stretch may increase results by accentuating the involved fibers. The point of the above study is that depending on the position of the shoulder, we can now determine the particular area of the capsule that is being stretched.

In the aforementioned study, they measured the strain (deformation) of the upper, middle and lower parts of the posterior capsule in positions of 0, 30, 60 and 90 degrees of elevation in thescapular plane; 60 degrees of flexion; 60 degrees of abduction; 30 degreesof extension, and 60 degrees of flexion and horizontal adduction. The authors concluded that the current positions of posterior capsule stretching, such as horizontal adduction or at 90 degrees abduction with internal rotation, were not sufficient to stretch the entire posterior capsule. They found large strains on the middle and lower capsule at the stretching position of 30 degrees of shoulder elevation in the scapular plane with internal rotation (Fig. 1), and for the upper and lower capsule, stretching at 30 degrees of extension with internal rotation (lift-off position) (Fig. 2).

 - Copyright – Stock Photo / Register Mark Fig. 1 Stretch position for middle & lower posterior capsule; 30-degree elevation in scapular plane.  - Copyright – Stock Photo / Register Mark Fig. 2 Stretch position for upper & lower posterior capsule; 30 degrees of extension with internal rotation for upper & lower capsule.

In the first scenario, the patient could hold their elbow and move their shoulder from external to internal rotation with the arm elevated 30 degrees in the scapular plane, or they could hold this position internally rotated to the end-range while the practitioner treated the area. Either way, we are assured that we are treating the middle and lower capsule. Due to the extended position of the shoulder in the second scenario, it might be more difficult to exert pressure on the capsule since the deltoid muscle is compressed, but it can be done. I have already noticed that there has been a more rapid improvement in several patients using these positions. How about attempting these positions and e-mailing me your thoughts?

Reference

  1. Izumi T, Aoki M, Murky T, et al. Stretching positions for the posterior capsule of the glenohumeral joint. Am J Sports Med 2008;36:2014-22.

Click here for more information about Warren Hammer, MS, DC, DABCO.

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