Purpose. To evaluate balance abilities and respiratory system health in undergraduate students (young adults) with scapular dyskinesia. Methods. 141 sedentary students [65 men (46.1%): 76 women (53.9%)] voluntarily participated in this cross-sectional, observational study that included participants with scapular dyskinesia (group-I; n = 76), and normal control, age-matched subjects (group-II; n = 65). The evaluated variables included scapular dyskinesia (including the dyskinesis side and type) evaluated by the Lateral scapular slide test (LSST), balance (including the overall limits of stability, the limit of stability at the right and the limit of stability at the left) evaluated by the Biodex Balance System, and the pulmonary health variables (including the forced vital capacity “FVC”, the forced expiratory volume in one second “FEV1”, the FEV1/FVC% ratio, the maximum voluntary ventilation “MVV”, peak expiratory flow rate “PEFr” and the estimated “lung age”) using portable spirometer. Results. Among the seventy-six participants with scapular dyskinesia, there were 31 (40.8%) participants with right-side dyskinesia, 21 (27.6%) participants with left-side dyskinesia, 24 (31.6) participants with bilateral dyskinesia. Results showed that there were significant differences between groups I and II in the overall limits of stability (P = 116-3), Limits of Stability “Rt side” (P = 4-2), “Limits of Stability (Lt side)” (P = 2-2), the FVC (P = 1-3), the FEV1 (P = 8-3), and the lung age (P = 1-3). Conclusion. The balance abilities and the pulmonary health variables are significantly deteriorated in young adults with scapular dyskinesis.
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