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  • The following term was not found in PubMed: Jan-Feb;31.
Am J Sports Med. 2003 Jan-Feb;31(1):126-34.

Subscapularis muscle activity during selected rehabilitation exercises.

Author information

1
Steadman-Hawkins Sports Medicine Foundation, Vail, Colorado 81657, USA. mike.decker@mail.utexas.edu

Abstract

BACKGROUND:

The upper and lower portions of the subscapularis muscle are independently innervated and activated.

HYPOTHESIS:

Upper and lower portions of the subscapularis muscle demonstrate different activation levels and require different exercises for rehabilitation.

STUDY DESIGN:

Controlled laboratory study.

METHODS:

Fifteen healthy subjects performed seven shoulder-strengthening exercises. Electromyographic data were collected from the latissimus dorsi, teres major, pectoralis major, infraspinatus, supraspinatus, and upper and lower subscapularis muscles.

RESULTS:

Upper subscapularis muscle activity was greater than lower subscapularis muscle activity for all exercises except for internal rotation with 0 degrees of humeral abduction. The push-up plus and diagonal exercises consistently stressed the upper and lower subscapularis muscles to the greatest extent.

CONCLUSIONS:

Humeral abduction was found to have a strong influence on the selective activation of the upper versus the lower subscapularis muscle and thus supported the design of different exercise continuums. In addition, the push-up plus and diagonal exercises were found to be superior to traditional internal rotation exercises for activating both functional portions of the subscapularis muscle.

CLINICAL RELEVANCE:

Our results showing that the upper and lower portions of the subscapularis muscle are functionally independent may affect training or rehabilitation protocols for the rotator cuff muscles.

PMID:
12531769
DOI:
10.1177/03635465030310010601
[Indexed for MEDLINE]

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