Scapular Kinematic Measurement in Subjects with and Without General Hypermobility Syndrome Using Motion Analysis System: A Reliability Study

Background: The purpose of the present study was to examine the reliability of scapular kinematic measurements using motion analysis system in subjects with and without General Hypermobility Syndrome. Methods: A methodological study was designed to assess the reliability of scapular movement measurement in two groups of females with and without General Hypermobility Syndrome. Upward rotation, superior- inferior translation, medial-lateral translation, posterior tilt and medial rotation were measured during arm elevation in both frontal and sagittal planes using a motion analysis system. Intraclass Correlation Coefficient (ICC) and Standard Error Measurement (SEM) were used to assess intra-rater within-day reliability of the scapular kinematics measurements in both groups. Results: The ICC values ranged from 0.72 to 0.98 and 0.69 to 0.98 for GHS and healthy subjects, respectively. In addition, the results showed that SEM for scapular rotation and translation are always lower than 1.72º and 1.65 cm, respectively. Conclusion: Motion analysis system could be used as a reliable method to measure the scapular kinematics in subjects with and without General Hypermobility Syndrome.