RELATIONSHIP BETWEEN THE SEQUENTIAL MOVEMENT, MUSCLE CO-CONTRACTION AND KLNEMATLC VARIABLES OF FLYING DISC BACKHAND THROWING

In Sub Jeong, Woo Seong Heo, Gizem Ozkaya, Jin Hyun Kim, Ki Kwang Lee

Abstract


The aim of this study was to analyse sequential movement of segments and co-contraction index and its correlation with kinematic variables. Disc trajectory and velocity (DV) variables calculated according to the medio-lateral (DOM) and vertical (DOV) displacement. The time differences calculated according to maximum linear velocity of segments from proximal to distal and reported as shoulder & elbow (S-E), elbow & wrist (E-W), wrist & finger (W-F). Co-contraction index (CI) were calculated for flexor and extensor carpi radialis. DV and S-E, W-F, DOM showed correlation which may be caused by the sequential movement of S-E, W-F and the displacement of the disc. Also, there was a correlation between the CI, DOM and DOV. Therefore, decrease of time gap between the segment movements and higher CI may increase the DV effectively.

Keywords


Flying disc throwing; sequential; correlation; Cccontraction Index

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ISSN 1999-4168