Importance of testing horizontal adduction & abduction in stiff shoulders

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According to Lin et al in persons with stiff shoulder

a. A strong co-relationship is found between functional disabilities in a stiff shoulder and posterior shoulder tightness. The study also revealed significant relationship between functional disabilities and cross-chest adduction.

b. There exists a significant relationship between internal rotation and posterior shoulder tightness. Similarly there is also a significant relationship of external rotation and anterior shoulder tightness.

c. Further significant correlations between shoulder internal rotation and cross-chest adduction, shoulder external rotation and below-chest abduction are observed, indicating that internal and external rotations might be related to posterior and anterior shoulder stiffness.

d. Below-chest abduction and cross-chest adduction were found to provide reliable data in shoulder stiffness & disbility.

Reference:
Lin JJ et al; Man Ther. 2006 May;11(2):146-52. Epub 2005 Aug 10. (Reliability and validity of shoulder tightness measurement in patients with stiff shoulders.)

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