Acute Effects of Posture Shirt Use on Scapular Kinematics and Rounded Shoulder Posture in College Students Public Deposited

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  • March 21, 2019
  • Manor, John Peter
    • Affiliation: College of Arts and Sciences, Department of Exercise and Sport Science
  • Context: Rounded shoulder posture and altered scapular kinematics can contribute to shoulder pain. Corrective techniques such as manual therapy and exercise are shown to correct poor biomechanics and rounded shoulder posture, but there is little evidence to suggest corrective garments such as posture shirts effectively treat rounded shoulder posture or poor scapular kinematics. Objectives: To determine the acute effects of posture shirt use on scapular kinematics and rounded shoulder posture in college students. Design: Repeated measures intervention study with counterbalanced conditions. Setting: Sports Medicine Research Laboratory. Participants: Twenty-one members of the general student body of a university, between 18 and 25 years old, with a forward shoulder angle (FSA) greater than 52°, no history of upper extremity surgery, scoliosis, active shoulder pain, or shoulder pain in the last three months that restricted participation for greater than three consecutive days. Interventions: Photographic posture assessment and biomechanical analysis of elevation tasks first under a control condition, second by either a sham condition or treatment condition; third, under another control condition and finally, the last condition (treatment or sham), counterbalanced to the first. Main Outcome Measures: Forward shoulder angle (FSA), calculated from lateral photograph, and scapular position and orientation collected through electromagnetic motion analysis during an elevation task. Results: Forward shoulder angle was decreased relative to the control condition while wearing the sham shirt (p=0.007) but not the posture shirt. There was a significant increase in scapular protraction at 90° (Conclusions: Application of posture shirts does not acutely alter forward shoulder angle or scapular kinematics, while application of a sham shirt may decrease forward shoulder angle at rest and increase scapular protraction at increased angles of humeral elevation.
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  • In Copyright
  • Myers, Joseph B.
  • Master of Arts
Graduation year
  • 2013

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