Changes in Infraspinatus Cross-Sectional Area and Echo Intensity in Relation to Scapular Dyskinesis and Overhead Training Volume in Collegiate Volleyball Players Public Deposited

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  • March 20, 2019
  • Chase, Kimberly
    • Affiliation: College of Arts and Sciences, Department of Exercise and Sport Science
  • During the pre-season injury risk in volleyball is highest at 6.19 injuries/1000 exposures. Injury to the posterior shoulder, specifically the infraspinatus, has been attributed to repetitive eccentric loading. The high volume of overhead activity in the collegiate volleyball player has been identified is a risk factor for upper extremity injury. Cross sectional area and echo intensity of the infraspinatus muscle were assessed using diagnostic ultrasound to measure muscle damage. Visual observation of scapular dyskinesis was completed at baseline and 24 hours following the pre-season training period to assess changes due to pre-season training volume. Correlations between cross sectional area, echo intensity, scapular dyskinesis, and swing count were also examined to assess relationships between these variables. Acceptable reliability was established for all measurements. This study found no significant outcomes in cross sectional area or echo intensity, in the severity of scapular dyskinesis, or in relationships between the variables of interest.
Date of publication
Resource type
Rights statement
  • In Copyright
  • Blackburn, J. Troy
  • Padua, Darin A.
  • Stanley, Laura
  • Myers, Joseph B.
  • Master of Arts
Degree granting institution
  • University of North Carolina at Chapel Hill Graduate School
Graduation year
  • 2016

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