Effects of pectoralis minor length on strength improvement and pain reduction during scapular reposition test

  • Lee I
  • Im S
  • Kim K
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Abstract

[Purpose] This study aimed to compare pain and shoulder elevation strength when scapular reposi-tion test is applied to subclinical individuals with a short or long pectoralis minor. [Participants and Methods] Subclinical participants (n=34) with a positive impingement result on at least one of three tests were assigned to short (n=18) or long (n=16) pectoralis minor groups. Impingement tests were repeated with and without scapular reposition test. Visual analog scale was used to measure pain intensities under both conditions. Isometric shoulder elevation strength was measured by dynamometry. Two-way analyzes of variance and paired t-test were used to evaluate the effects of scapular reposition test in the two groups. [Results] The effects of pectoralis minor length on the frequencies of meaningful strength, pain reduction, and positive scapular reposition test result were evaluated. Repositioning reduced pain in both groups. In the short pectoralis minor group, shoulder elevation strength was significantly improved by scapular reposition test. A meaningful strength improvement and positive scapular reposition test result were reported more frequently in the short pectoralis minor group. [Conclusion] Consideration of pectoralis minor length and scapular reposition test results could aid the identification of factors contributing to scapular dyskinesis and related shoulder injuries, thereby enabling the selection of appropriate interventions.

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Lee, I.-G., Im, S.-C., & Kim, K. (2020). Effects of pectoralis minor length on strength improvement and pain reduction during scapular reposition test. Journal of Physical Therapy Science, 32(1), 42–47. https://doi.org/10.1589/jpts.32.42

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