Differences in Activation Patterns of Shoulder Girdle Muscles in Recurve Archers

Authors : İpek EROĞLU KOLAYİŞ, Hayri ERTAN

Pages : 25-34

View : 28 | Download : 9

Publication Date : 2016-01-19

Article Type : Other Papers

Abstract :Abstract The purpose of this study was to observe the differences in activation patterns in shoulder girdle muscles of drawing and bow arm during archery shooting. 106 shots were analysed of eight subjects that have been involved in the current study were the associate archers for Turkish junior national team. The measurement sites were prepared according to SENIAM’s recommendations. Pass band of EMG amplifier, sampling rate, maximum intra-electrode impedance and common mode rejection ratio insert ignore into journalissuearticles values(CMMR); were 8-500 Hz, 1000 Hz, 6 kOhms and 95 dB, respectively. EMG activities of M. Deltoid Middle and Posterior, M. Trapezius Middle and Lower were quantified in both drawing and bow arm. Three-second periods of twelve shots’ EMG data were full-wave rectified and filtered insert ignore into journalissuearticles values(moving average filter with 60 ms time-window); for each archer. ANOVA test and Tukey post hoc were used to assess the differences among periods. Drawing arm normalized DM iEMG activity was significantly low in third period  insert ignore into journalissuearticles values(DM MVC %; 1. Period; 17.892±7.505 2. Period; 20.941±10.556;3. Period; 8.312±6.3); insert ignore into journalissuearticles values(p<0.05);. Drawing arm DP muscle activation was significantly higher both first insert ignore into journalissuearticles values(16.593±4.585); and second period insert ignore into journalissuearticles values(18.801±5.546); then third period insert ignore into journalissuearticles values(6.787±6.068);. TM and TL iEMG activities in the drawing arm have been statistically higher in second period insert ignore into journalissuearticles values(p<0.05);. Bow arm DM  and DP muscle activities were statistically lower insert ignore into journalissuearticles values(DM: 15.985±8.729; DP:10.03±5.865 ); in 3. period. Similar statistical differences in bow arm TM and TL muscles can be seen in III. Period. Both in drawing arm and bow arm shoulder girdle muscles have been showed significant decreasing in the third period starting by releasing process. 
Keywords : Archery, Electromyography, Muscular Analysis, Activation pattern