Yüzücülerde Kas Yorgunluğunun Skapular Kinematiğe ve Fonksiyonelliğe Etkisi

Abstract

Özyılmaz U. U, The Effect of Muscle Fatigue on Scapular Kinematics and Functionality in Swimmers, Hacettepe University, Institute of Health Sciences, Sports Physiotherapy Program, Master of Science Thesis, Ankara, 2018. The aim of this study was to evaluate the shoulder kinematics and investigate the effect of scapular muscle fatigue on scapular kinematics. Twenty-seven athletes who did not have shoulder pain and/or shoulder related surgical history and professionally interested in swimming sports were included to study. Fatigue protocol was created with 4 exercises chosen to create fatigue in scapular muscles. Before and after fatigue 3-dimensional scapular kinematics (scapular upward-downward rotation, internal-external rotation and anterior-posterior tilt) were analyzed during lifting and lowering of the 30°, 60°, 90° and 120° humerothoracic elevation using an electromagnetic system. Pre and post fatigue functionality was assessed by modified push-up test, closed kinetic chain upper extremity stabilization test, and unilateral seated shot put test. The scapular kinematic datas recorded before and after fatigue were analyzed using bivariate repetitive variance analysis, functional tests were analyzed with Student t test and Wilcoxon test. As a result of statistical analysis at 3-dimensional scapular kinematic, there was an increase in scapular internal rotations at 30° elevation and 120° deceleration levels (p<0.05). There was no statistical difference at scapular upward-downward rotation and scapular anterior-posterior tilt angles after fatigue (p>0.05). There was a statistically significant decrease after fatigue at modified push-up test (p<0.001), closed kinetic chain upper extremity stabilization test (p<0.001) and unilateral seated shot put test (p<0.05). On the non-dominant side, there was no statistically significant difference in health ball throw distance (p>0.05). The results of this study showed that scapular muscle fatigue affects scapular kinematics and functionality in swimmers. The results of this study, in which the adaptation of the neuromuscular system and the changes in performance are examined in detail, show the basic biomechanical knowledge that will lead to development of rehabilitation and training programs, prevention of possible injuries and determination of injury risks in individuals who are interested in overhead sports such as swimming sports.